/*
 * jQuery UI @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus (ui.jquery.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 */
;(function($) {

/** jQuery core modifications and additions **/

var _remove = $.fn.remove;
$.fn.remove = function() {
	$("*", this).add(this).triggerHandler("remove");
	return _remove.apply(this, arguments );
};

function isVisible(element) {
	function checkStyles(element) {
		var style = element.style;
		return (style.display != 'none' && style.visibility != 'hidden');
	}
	
	var visible = checkStyles(element);
	
	(visible && $.each($.dir(element, 'parentNode'), function() {
		return (visible = checkStyles(this));
	}));
	
	return visible;
}

$.extend($.expr[':'], {
	data: function(a, i, m) {
		return $.data(a, m[3]);
	},
	
	// TODO: add support for object, area
	tabbable: function(a, i, m) {
		var nodeName = a.nodeName.toLowerCase();
		
		return (
			// in tab order
			a.tabIndex >= 0 &&
			
			( // filter node types that participate in the tab order
				
				// anchor tag
				('a' == nodeName && a.href) ||
				
				// enabled form element
				(/input|select|textarea|button/.test(nodeName) &&
					'hidden' != a.type && !a.disabled)
			) &&
			
			// visible on page
			isVisible(a)
		);
	}
});

$.keyCode = {
	BACKSPACE: 8,
	CAPS_LOCK: 20,
	COMMA: 188,
	CONTROL: 17,
	DELETE: 46,
	DOWN: 40,
	END: 35,
	ENTER: 13,
	ESCAPE: 27,
	HOME: 36,
	INSERT: 45,
	LEFT: 37,
	NUMPAD_ADD: 107,
	NUMPAD_DECIMAL: 110,
	NUMPAD_DIVIDE: 111,
	NUMPAD_ENTER: 108,
	NUMPAD_MULTIPLY: 106,
	NUMPAD_SUBTRACT: 109,
	PAGE_DOWN: 34,
	PAGE_UP: 33,
	PERIOD: 190,
	RIGHT: 39,
	SHIFT: 16,
	SPACE: 32,
	TAB: 9,
	UP: 38
};

// $.widget is a factory to create jQuery plugins
// taking some boilerplate code out of the plugin code
// created by Scott González and Jörn Zaefferer
function getter(namespace, plugin, method, args) {
	function getMethods(type) {
		var methods = $[namespace][plugin][type] || [];
		return (typeof methods == 'string' ? methods.split(/,?\s+/) : methods);
	}
	
	var methods = getMethods('getter');
	if (args.length == 1 && typeof args[0] == 'string') {
		methods = methods.concat(getMethods('getterSetter'));
	}
	return ($.inArray(method, methods) != -1);
}

$.widget = function(name, prototype) {
	var namespace = name.split(".")[0];
	name = name.split(".")[1];
	
	// create plugin method
	$.fn[name] = function(options) {
		var isMethodCall = (typeof options == 'string'),
			args = Array.prototype.slice.call(arguments, 1);
		
		// prevent calls to internal methods
		if (isMethodCall && options.substring(0, 1) == '_') {
			return this;
		}
		
		// handle getter methods
		if (isMethodCall && getter(namespace, name, options, args)) {
			var instance = $.data(this[0], name);
			return (instance ? instance[options].apply(instance, args)
				: undefined);
		}
		
		// handle initialization and non-getter methods
		return this.each(function() {
			var instance = $.data(this, name);
			
			// constructor
			(!instance && !isMethodCall &&
				$.data(this, name, new $[namespace][name](this, options)));
			
			// method call
			(instance && isMethodCall && $.isFunction(instance[options]) &&
				instance[options].apply(instance, args));
		});
	};
	
	// create widget constructor
	$[namespace][name] = function(element, options) {
		var self = this;
		
		this.widgetName = name;
		this.widgetEventPrefix = $[namespace][name].eventPrefix || name;
		this.widgetBaseClass = namespace + '-' + name;
		
		this.options = $.extend({},
			$.widget.defaults,
			$[namespace][name].defaults,
			$.metadata && $.metadata.get(element)[name],
			options);
		
		this.element = $(element)
			.bind('setData.' + name, function(e, key, value) {
				return self._setData(key, value);
			})
			.bind('getData.' + name, function(e, key) {
				return self._getData(key);
			})
			.bind('remove', function() {
				return self.destroy();
			});
		
		this._init();
	};
	
	// add widget prototype
	$[namespace][name].prototype = $.extend({}, $.widget.prototype, prototype);
	
	// TODO: merge getter and getterSetter properties from widget prototype
	// and plugin prototype
	$[namespace][name].getterSetter = 'option';
};

$.widget.prototype = {
	_init: function() {},
	destroy: function() {
		this.element.removeData(this.widgetName);
	},
	
	option: function(key, value) {
		var options = key,
			self = this;
		
		if (typeof key == "string") {
			if (value === undefined) {
				return this._getData(key);
			}
			options = {};
			options[key] = value;
		}
		
		$.each(options, function(key, value) {
			self._setData(key, value);
		});
	},
	_getData: function(key) {
		return this.options[key];
	},
	_setData: function(key, value) {
		this.options[key] = value;
		
		if (key == 'disabled') {
			this.element[value ? 'addClass' : 'removeClass'](
				this.widgetBaseClass + '-disabled');
		}
	},
	
	enable: function() {
		this._setData('disabled', false);
	},
	disable: function() {
		this._setData('disabled', true);
	},
	
	_trigger: function(type, e, data) {
		var eventName = (type == this.widgetEventPrefix
			? type : this.widgetEventPrefix + type);
		e = e  || $.event.fix({ type: eventName, target: this.element[0] });
		return this.element.triggerHandler(eventName, [e, data], this.options[type]);
	}
};

$.widget.defaults = {
	disabled: false
};


/** jQuery UI core **/

$.ui = {
	plugin: {
		add: function(module, option, set) {
			var proto = $.ui[module].prototype;
			for(var i in set) {
				proto.plugins[i] = proto.plugins[i] || [];
				proto.plugins[i].push([option, set[i]]);
			}
		},
		call: function(instance, name, args) {
			var set = instance.plugins[name];
			if(!set) { return; }
			
			for (var i = 0; i < set.length; i++) {
				if (instance.options[set[i][0]]) {
					set[i][1].apply(instance.element, args);
				}
			}
		}	
	},
	cssCache: {},
	css: function(name) {
		if ($.ui.cssCache[name]) { return $.ui.cssCache[name]; }
		var tmp = $('<div class="ui-gen">').addClass(name).css({position:'absolute', top:'-5000px', left:'-5000px', display:'block'}).appendTo('body');
		
		//if (!$.browser.safari)
			//tmp.appendTo('body'); 
		
		//Opera and Safari set width and height to 0px instead of auto
		//Safari returns rgba(0,0,0,0) when bgcolor is not set
		$.ui.cssCache[name] = !!(
			(!(/auto|default/).test(tmp.css('cursor')) || (/^[1-9]/).test(tmp.css('height')) || (/^[1-9]/).test(tmp.css('width')) || 
			!(/none/).test(tmp.css('backgroundImage')) || !(/transparent|rgba\(0, 0, 0, 0\)/).test(tmp.css('backgroundColor')))
		);
		try { $('body').get(0).removeChild(tmp.get(0));	} catch(e){}
		return $.ui.cssCache[name];
	},
	disableSelection: function(el) {
		return $(el)
			.attr('unselectable', 'on')
			.css('MozUserSelect', 'none')
			.bind('selectstart.ui', function() { return false; });
	},
	enableSelection: function(el) {
		return $(el)
			.attr('unselectable', 'off')
			.css('MozUserSelect', '')
			.unbind('selectstart.ui');
	},
	hasScroll: function(e, a) {
		
		//If overflow is hidden, the element might have extra content, but the user wants to hide it
		if ($(e).css('overflow') == 'hidden') { return false; }
		
		var scroll = (a && a == 'left') ? 'scrollLeft' : 'scrollTop',
			has = false;
		
		if (e[scroll] > 0) { return true; }
		
		// TODO: determine which cases actually cause this to happen
		// if the element doesn't have the scroll set, see if it's possible to
		// set the scroll
		e[scroll] = 1;
		has = (e[scroll] > 0);
		e[scroll] = 0;
		return has;
	}
};


/** Mouse Interaction Plugin **/

$.ui.mouse = {
	_mouseInit: function() {
		var self = this;
	
		this.element.bind('mousedown.'+this.widgetName, function(e) {
			return self._mouseDown(e);
		});
		
		// Prevent text selection in IE
		if ($.browser.msie) {
			this._mouseUnselectable = this.element.attr('unselectable');
			this.element.attr('unselectable', 'on');
		}
		
		this.started = false;
	},
	
	// TODO: make sure destroying one instance of mouse doesn't mess with
	// other instances of mouse
	_mouseDestroy: function() {
		this.element.unbind('.'+this.widgetName);
		
		// Restore text selection in IE
		($.browser.msie
			&& this.element.attr('unselectable', this._mouseUnselectable));
	},
	
	_mouseDown: function(e) {
		// we may have missed mouseup (out of window)
		(this._mouseStarted && this._mouseUp(e));
		
		this._mouseDownEvent = e;
		
		var self = this,
			btnIsLeft = (e.which == 1),
			elIsCancel = (typeof this.options.cancel == "string" ? $(e.target).parents().add(e.target).filter(this.options.cancel).length : false);
		if (!btnIsLeft || elIsCancel || !this._mouseCapture(e)) {
			return true;
		}
		
		this.mouseDelayMet = !this.options.delay;
		if (!this.mouseDelayMet) {
			this._mouseDelayTimer = setTimeout(function() {
				self.mouseDelayMet = true;
			}, this.options.delay);
		}
		
		if (this._mouseDistanceMet(e) && this._mouseDelayMet(e)) {
			this._mouseStarted = (this._mouseStart(e) !== false);
			if (!this._mouseStarted) {
				e.preventDefault();
				return true;
			}
		}
		
		// these delegates are required to keep context
		this._mouseMoveDelegate = function(e) {
			return self._mouseMove(e);
		};
		this._mouseUpDelegate = function(e) {
			return self._mouseUp(e);
		};
		$(document)
			.bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
			.bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
		
		return false;
	},
	
	_mouseMove: function(e) {
		// IE mouseup check - mouseup happened when mouse was out of window
		if ($.browser.msie && !e.button) {
			return this._mouseUp(e);
		}
		
		if (this._mouseStarted) {
			this._mouseDrag(e);
			return false;
		}
		
		if (this._mouseDistanceMet(e) && this._mouseDelayMet(e)) {
			this._mouseStarted =
				(this._mouseStart(this._mouseDownEvent, e) !== false);
			(this._mouseStarted ? this._mouseDrag(e) : this._mouseUp(e));
		}
		
		return !this._mouseStarted;
	},
	
	_mouseUp: function(e) {
		$(document)
			.unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
			.unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
		
		if (this._mouseStarted) {
			this._mouseStarted = false;
			this._mouseStop(e);
		}
		
		return false;
	},
	
	_mouseDistanceMet: function(e) {
		return (Math.max(
				Math.abs(this._mouseDownEvent.pageX - e.pageX),
				Math.abs(this._mouseDownEvent.pageY - e.pageY)
			) >= this.options.distance
		);
	},
	
	_mouseDelayMet: function(e) {
		return this.mouseDelayMet;
	},
	
	// These are placeholder methods, to be overriden by extending plugin
	_mouseStart: function(e) {},
	_mouseDrag: function(e) {},
	_mouseStop: function(e) {},
	_mouseCapture: function(e) { return true; }
};

$.ui.mouse.defaults = {
	cancel: null,
	distance: 1,
	delay: 0
};

})(jQuery);
/*
 * jQuery UI Draggable @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Draggables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

$.widget("ui.draggable", $.extend({}, $.ui.mouse, {
	
	getHandle: function(e) {

		var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
		$(this.options.handle, this.element)
			.find("*")
			.andSelf()
			.each(function() {
				if(this == e.target) handle = true;
			});
		
		return handle;

	},
	
	createHelper: function() {

		var o = this.options;
		var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [e])) : (o.helper == 'clone' ? this.element.clone() : this.element);
		
		if(!helper.parents('body').length)
			helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));
			
		if(helper[0] != this.element[0] && !(/(fixed|absolute)/).test(helper.css("position")))
			helper.css("position", "absolute");
			
		return helper;
		
	},
	
	
	_init: function() {
		
		if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position")))
			this.element[0].style.position = 'relative';
		
		(this.options.cssNamespace && this.element.addClass(this.options.cssNamespace+"-draggable"));
		(this.options.disabled && this.element.addClass('ui-draggable-disabled'));
		
		this._mouseInit();
		
	},

	_mouseCapture: function(e) {

		var o = this.options;
		
		if (this.helper || o.disabled || $(e.target).is('.ui-resizable-handle'))
			return false;
			
		//Quit if we're not on a valid handle
		this.handle = this.getHandle(e);
		if (!this.handle)
			return false;
		
		return true;

	},

	_mouseStart: function(e) {
		
		var o = this.options;
		
		//Create and append the visible helper
		this.helper = this.createHelper();
		
		//If ddmanager is used for droppables, set the global draggable
		if($.ui.ddmanager)
			$.ui.ddmanager.current = this;
		
		/*
		 * - Position generation -
		 * This block generates everything position related - it's the core of draggables.
		 */
		
		this.margins = {																				//Cache the margins
			left: (parseInt(this.element.css("marginLeft"),10) || 0),
			top: (parseInt(this.element.css("marginTop"),10) || 0)
		};		
		
		this.cssPosition = this.helper.css("position");													//Store the helper's css position
		this.offset = this.element.offset();															//The element's absolute position on the page
		this.offset = {																					//Substract the margins from the element's absolute offset
			top: this.offset.top - this.margins.top,
			left: this.offset.left - this.margins.left
		};
		
		this.offset.click = {																			//Where the click happened, relative to the element
			left: e.pageX - this.offset.left,
			top: e.pageY - this.offset.top
		};

		//Calling this method cached the next parents that have scrollTop / scrollLeft attached
		this.cacheScrollParents();
		
		
		this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset();			//Get the offsetParent and cache its position
		if(this.offsetParent[0] == document.body && $.browser.mozilla) po = { top: 0, left: 0 };		//Ugly FF3 fix
		this.offset.parent = {																			//Store its position plus border
			top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
			left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
		};
		
		//This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
		if(this.cssPosition == "relative") {
			var p = this.element.position();
			this.offset.relative = {
				top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollTopParent.scrollTop(),
				left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollLeftParent.scrollLeft()
			};
		} else {
			this.offset.relative = { top: 0, left: 0 };
		}
		
		//Generate the original position
		this.originalPosition = this._generatePosition(e);
		
		//Cache the helper size
		this.cacheHelperProportions();
		
		//Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
		if(o.cursorAt)
			this.adjustOffsetFromHelper(o.cursorAt);

		//Cache later used stuff
		$.extend(this, {
			PAGEY_INCLUDES_SCROLL: (this.cssPosition == "absolute" && (!this.scrollTopParent[0].tagName || (/(html|body)/i).test(this.scrollTopParent[0].tagName))),
			PAGEX_INCLUDES_SCROLL: (this.cssPosition == "absolute" && (!this.scrollLeftParent[0].tagName || (/(html|body)/i).test(this.scrollLeftParent[0].tagName))),
			OFFSET_PARENT_NOT_SCROLL_PARENT_Y: this.scrollTopParent[0] != this.offsetParent[0] && !(this.scrollTopParent[0] == document && (/(body|html)/i).test(this.offsetParent[0].tagName)),
			OFFSET_PARENT_NOT_SCROLL_PARENT_X: this.scrollLeftParent[0] != this.offsetParent[0] && !(this.scrollLeftParent[0] == document && (/(body|html)/i).test(this.offsetParent[0].tagName))
		});
		
		if(o.containment)
			this.setContainment();

		
		//Call plugins and callbacks
		this._propagate("start", e);
		
		//Recache the helper size
		this.cacheHelperProportions();
		
		//Prepare the droppable offsets
		if ($.ui.ddmanager && !o.dropBehaviour)
			$.ui.ddmanager.prepareOffsets(this, e);
		
		this.helper.addClass("ui-draggable-dragging");
		this._mouseDrag(e); //Execute the drag once - this causes the helper not to be visible before getting its correct position
		return true;
	},
	
	cacheScrollParents: function() {

		this.scrollTopParent = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-y'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(this.helper);
		this.scrollLeftParent = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-x'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(this.helper);

	},
	
	adjustOffsetFromHelper: function(obj) {
		if(obj.left != undefined) this.offset.click.left = obj.left + this.margins.left;
		if(obj.right != undefined) this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
		if(obj.top != undefined) this.offset.click.top = obj.top + this.margins.top;
		if(obj.bottom != undefined) this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
	},
	
	cacheHelperProportions: function() {
		this.helperProportions = {
			width: this.helper.outerWidth(),
			height: this.helper.outerHeight()
		};
	},
	
	setContainment: function() {

		var o = this.options;
		if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
		if(o.containment == 'document' || o.containment == 'window') this.containment = [
			0 - this.offset.relative.left - this.offset.parent.left,
			0 - this.offset.relative.top - this.offset.parent.top,
			$(o.containment == 'document' ? document : window).width() - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
			($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
		];
		
		if(!(/^(document|window|parent)$/).test(o.containment)) {
			var ce = $(o.containment)[0];
			var co = $(o.containment).offset();
			var over = ($(ce).css("overflow") != 'hidden');
			
			this.containment = [
				co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left,
				co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top,
				co.left+(over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
				co.top+(over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
			];
		}

	},
	
	
	_convertPositionTo: function(d, pos) {

		if(!pos) pos = this.position;
		var mod = d == "absolute" ? 1 : -1;

		return {
			top: (
				pos.top																	// the calculated relative position
				+ this.offset.relative.top	* mod										// Only for relative positioned nodes: Relative offset from element to offset parent
				+ this.offset.parent.top * mod											// The offsetParent's offset without borders (offset + border)
				- (this.cssPosition == "fixed" || this.PAGEY_INCLUDES_SCROLL || this.OFFSET_PARENT_NOT_SCROLL_PARENT_Y ? 0 : this.scrollTopParent.scrollTop()) * mod	// The offsetParent's scroll position, not if the element is fixed
				+ (this.cssPosition == "fixed" ? $(document).scrollTop() : 0) * mod
				+ this.margins.top * mod												//Add the margin (you don't want the margin counting in intersection methods)
			),
			left: (
				pos.left																// the calculated relative position
				+ this.offset.relative.left	* mod										// Only for relative positioned nodes: Relative offset from element to offset parent
				+ this.offset.parent.left * mod											// The offsetParent's offset without borders (offset + border)
				- (this.cssPosition == "fixed" || this.PAGEX_INCLUDES_SCROLL || this.OFFSET_PARENT_NOT_SCROLL_PARENT_X ? 0 : this.scrollLeftParent.scrollLeft()) * mod	// The offsetParent's scroll position, not if the element is fixed
				+ (this.cssPosition == "fixed" ? $(document).scrollLeft() : 0) * mod
				+ this.margins.left * mod												//Add the margin (you don't want the margin counting in intersection methods)
			)
		};
	},
	_generatePosition: function(e) {

		var o = this.options;
		var position = {
			top: (
				e.pageY																	// The absolute mouse position
				- this.offset.click.top													// Click offset (relative to the element)
				- this.offset.relative.top												// Only for relative positioned nodes: Relative offset from element to offset parent
				- this.offset.parent.top												// The offsetParent's offset without borders (offset + border)
				+ (this.cssPosition == "fixed" || this.PAGEY_INCLUDES_SCROLL || this.OFFSET_PARENT_NOT_SCROLL_PARENT_Y ? 0 : this.scrollTopParent.scrollTop())	// The offsetParent's scroll position, not if the element is fixed
				- (this.cssPosition == "fixed" ? $(document).scrollTop() : 0)
			),
			left: (
				e.pageX																	// The absolute mouse position
				- this.offset.click.left												// Click offset (relative to the element)
				- this.offset.relative.left												// Only for relative positioned nodes: Relative offset from element to offset parent
				- this.offset.parent.left												// The offsetParent's offset without borders (offset + border)
				+ (this.cssPosition == "fixed" || this.PAGEX_INCLUDES_SCROLL || this.OFFSET_PARENT_NOT_SCROLL_PARENT_X ? 0 : this.scrollLeftParent.scrollLeft())	// The offsetParent's scroll position, not if the element is fixed
				- (this.cssPosition == "fixed" ? $(document).scrollLeft() : 0)
			)
		};
	
		if(!this.originalPosition) return position;										//If we are not dragging yet, we won't check for options
		
		/*
		 * - Position constraining -
		 * Constrain the position to a mix of grid, containment.
		 */
		if(this.containment) {
			if(position.left < this.containment[0]) position.left = this.containment[0];
			if(position.top < this.containment[1]) position.top = this.containment[1];
			if(position.left > this.containment[2]) position.left = this.containment[2];
			if(position.top > this.containment[3]) position.top = this.containment[3];
		}
		
		if(o.grid) {
			var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1];
			position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
			
			var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0];
			position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
		}
		
		return position;
	},
	_mouseDrag: function(e) {
	
		//Compute the helpers position
		this.position = this._generatePosition(e);
		this.positionAbs = this._convertPositionTo("absolute");
		
		//Call plugins and callbacks and use the resulting position if something is returned		
		this.position = this._propagate("drag", e) || this.position;
	
		if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
		if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
		if($.ui.ddmanager) $.ui.ddmanager.drag(this, e);
		
		return false;
	},
	_mouseStop: function(e) {
		
		//If we are using droppables, inform the manager about the drop
		var dropped = false;
		if ($.ui.ddmanager && !this.options.dropBehaviour)
			var dropped = $.ui.ddmanager.drop(this, e);		
		
		if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
			var self = this;
			$(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10) || 500, function() {
				self._propagate("stop", e);
				self._clear();
			});
		} else {
			this._propagate("stop", e);
			this._clear();
		}
		
		return false;
	},
	_clear: function() {
		this.helper.removeClass("ui-draggable-dragging");
		if(this.options.helper != 'original' && !this.cancelHelperRemoval) this.helper.remove();
		//if($.ui.ddmanager) $.ui.ddmanager.current = null;
		this.helper = null;
		this.cancelHelperRemoval = false;
	},
	
	// From now on bulk stuff - mainly helpers
	plugins: {},
	uiHash: function(e) {
		return {
			helper: this.helper,
			position: this.position,
			absolutePosition: this.positionAbs,
			options: this.options			
		};
	},
	_propagate: function(n,e) {
		$.ui.plugin.call(this, n, [e, this.uiHash()]);
		if(n == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins
		return this.element.triggerHandler(n == "drag" ? n : "drag"+n, [e, this.uiHash()], this.options[n]);
	},
	destroy: function() {
		if(!this.element.data('draggable')) return;
		this.element.removeData("draggable").unbind(".draggable").removeClass('ui-draggable ui-draggable-dragging ui-draggable-disabled');
		this._mouseDestroy();
	}
}));

$.extend($.ui.draggable, {
	defaults: {
		appendTo: "parent",
		axis: false,
		cancel: ":input",
		delay: 0,
		distance: 1,
		helper: "original",
		scope: "default",
		cssNamespace: "ui"
	}
});

$.ui.plugin.add("draggable", "cursor", {
	start: function(e, ui) {
		var t = $('body');
		if (t.css("cursor")) ui.options._cursor = t.css("cursor");
		t.css("cursor", ui.options.cursor);
	},
	stop: function(e, ui) {
		if (ui.options._cursor) $('body').css("cursor", ui.options._cursor);
	}
});

$.ui.plugin.add("draggable", "zIndex", {
	start: function(e, ui) {
		var t = $(ui.helper);
		if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex");
		t.css('zIndex', ui.options.zIndex);
	},
	stop: function(e, ui) {
		if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex);
	}
});

$.ui.plugin.add("draggable", "opacity", {
	start: function(e, ui) {
		var t = $(ui.helper);
		if(t.css("opacity")) ui.options._opacity = t.css("opacity");
		t.css('opacity', ui.options.opacity);
	},
	stop: function(e, ui) {
		if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity);
	}
});

$.ui.plugin.add("draggable", "iframeFix", {
	start: function(e, ui) {
		$(ui.options.iframeFix === true ? "iframe" : ui.options.iframeFix).each(function() {					
			$('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
			.css({
				width: this.offsetWidth+"px", height: this.offsetHeight+"px",
				position: "absolute", opacity: "0.001", zIndex: 1000
			})
			.css($(this).offset())
			.appendTo("body");
		});
	},
	stop: function(e, ui) {
		$("div.ui-draggable-iframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers	
	}
});



$.ui.plugin.add("draggable", "scroll", {
	start: function(e, ui) {
		var o = ui.options;
		var i = $(this).data("draggable");
		o.scrollSensitivity	= o.scrollSensitivity || 20;
		o.scrollSpeed		= o.scrollSpeed || 20;
		
		i.overflowY = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-y'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(this);
		i.overflowX = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-x'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(this);
		
		if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') i.overflowYOffset = i.overflowY.offset();
		if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') i.overflowXOffset = i.overflowX.offset();
		
	},
	drag: function(e, ui) {
		
		var o = ui.options, scrolled = false;
		var i = $(this).data("draggable");
		
		if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') {
			if((i.overflowYOffset.top + i.overflowY[0].offsetHeight) - e.pageY < o.scrollSensitivity)
				i.overflowY[0].scrollTop = scrolled = i.overflowY[0].scrollTop + o.scrollSpeed;
			if(e.pageY - i.overflowYOffset.top < o.scrollSensitivity)
				i.overflowY[0].scrollTop = scrolled = i.overflowY[0].scrollTop - o.scrollSpeed;
							
		} else {
			if(e.pageY - $(document).scrollTop() < o.scrollSensitivity)
				scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
			if($(window).height() - (e.pageY - $(document).scrollTop()) < o.scrollSensitivity)
				scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
		}
		
		if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') {
			if((i.overflowXOffset.left + i.overflowX[0].offsetWidth) - e.pageX < o.scrollSensitivity)
				i.overflowX[0].scrollLeft = scrolled = i.overflowX[0].scrollLeft + o.scrollSpeed;
			if(e.pageX - i.overflowXOffset.left < o.scrollSensitivity)
				i.overflowX[0].scrollLeft = scrolled = i.overflowX[0].scrollLeft - o.scrollSpeed;
		} else {
			if(e.pageX - $(document).scrollLeft() < o.scrollSensitivity)
				scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
			if($(window).width() - (e.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
				scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
		}
		
		if(scrolled !== false)
			$.ui.ddmanager.prepareOffsets(i, e);
		
	}
});


$.ui.plugin.add("draggable", "snap", {
	start: function(e, ui) {
		
		var inst = $(this).data("draggable");
		inst.snapElements = [];

		$(ui.options.snap.constructor != String ? ( ui.options.snap.items || ':data(draggable)' ) : ui.options.snap).each(function() {
			var $t = $(this); var $o = $t.offset();
			if(this != inst.element[0]) inst.snapElements.push({
				item: this,
				width: $t.outerWidth(), height: $t.outerHeight(),
				top: $o.top, left: $o.left
			});
		});
		
	},
	drag: function(e, ui) {
	
		var inst = $(this).data("draggable");
		var d = ui.options.snapTolerance || 20;

		var x1 = ui.absolutePosition.left, x2 = x1 + inst.helperProportions.width,
			y1 = ui.absolutePosition.top, y2 = y1 + inst.helperProportions.height;
		
		for (var i = inst.snapElements.length - 1; i >= 0; i--){
			
			var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width, 
				t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;
		
			//Yes, I know, this is insane ;)
			if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) {
				if(inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, null, $.extend(inst.uiHash(), { snapItem: inst.snapElements[i].item })));
				inst.snapElements[i].snapping = false;
				continue;
			}
		
			if(ui.options.snapMode != 'inner') {
				var ts = Math.abs(t - y2) <= d;
				var bs = Math.abs(b - y1) <= d;
				var ls = Math.abs(l - x2) <= d;
				var rs = Math.abs(r - x1) <= d;
				if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top;
				if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top;
				if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left;
				if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left;
			}
			
			var first = (ts || bs || ls || rs);
			
			if(ui.options.snapMode != 'outer') {
				var ts = Math.abs(t - y1) <= d;
				var bs = Math.abs(b - y2) <= d;
				var ls = Math.abs(l - x1) <= d;
				var rs = Math.abs(r - x2) <= d;
				if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top;
				if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top;
				if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left;
				if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left;
			}
			
			if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first))
				(inst.options.snap.snap && inst.options.snap.snap.call(inst.element, null, $.extend(inst.uiHash(), { snapItem: inst.snapElements[i].item })));
			inst.snapElements[i].snapping = (ts || bs || ls || rs || first);
			
		};

	}
});

$.ui.plugin.add("draggable", "connectToSortable", {
	start: function(e,ui) {
	
		var inst = $(this).data("draggable");
		inst.sortables = [];
		$(ui.options.connectToSortable).each(function() {
			if($.data(this, 'sortable')) {
				var sortable = $.data(this, 'sortable');
				inst.sortables.push({
					instance: sortable,
					shouldRevert: sortable.options.revert
				});
				sortable._refreshItems();	//Do a one-time refresh at start to refresh the containerCache	
				sortable._propagate("activate", e, inst);
			}
		});

	},
	stop: function(e,ui) {
		
		//If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
		var inst = $(this).data("draggable");
		
		$.each(inst.sortables, function() {
			if(this.instance.isOver) {
				this.instance.isOver = 0;
				inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
				this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)
				if(this.shouldRevert) this.instance.options.revert = true; //revert here
				this.instance._mouseStop(e);
				
				//Also propagate receive event, since the sortable is actually receiving a element
				this.instance.element.triggerHandler("sortreceive", [e, $.extend(this.instance.ui(), { sender: inst.element })], this.instance.options["receive"]);

				this.instance.options.helper = this.instance.options._helper;
			} else {
				this.instance._propagate("deactivate", e, inst);
			}

		});
		
	},
	drag: function(e,ui) {

		var inst = $(this).data("draggable"), self = this;
		
		var checkPos = function(o) {
				
			var l = o.left, r = l + o.width,
				t = o.top, b = t + o.height;

			return (l < (this.positionAbs.left + this.offset.click.left) && (this.positionAbs.left + this.offset.click.left) < r
					&& t < (this.positionAbs.top + this.offset.click.top) && (this.positionAbs.top + this.offset.click.top) < b);				
		};
		
		$.each(inst.sortables, function(i) {

			if(checkPos.call(inst, this.instance.containerCache)) {

				//If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
				if(!this.instance.isOver) {
					this.instance.isOver = 1;

					//Now we fake the start of dragging for the sortable instance,
					//by cloning the list group item, appending it to the sortable and using it as inst.currentItem
					//We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
					this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true);
					this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
					this.instance.options.helper = function() { return ui.helper[0]; };
				
					e.target = this.instance.currentItem[0];
					this.instance._mouseCapture(e, true);
					this.instance._mouseStart(e, true, true);

					//Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
					this.instance.offset.click.top = inst.offset.click.top;
					this.instance.offset.click.left = inst.offset.click.left;
					this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
					this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;
					
					inst._propagate("toSortable", e);
				
				}
				
				//Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
				if(this.instance.currentItem) this.instance._mouseDrag(e);
				
			} else {
				
				//If it doesn't intersect with the sortable, and it intersected before,
				//we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
				if(this.instance.isOver) {
					this.instance.isOver = 0;
					this.instance.cancelHelperRemoval = true;
					this.instance.options.revert = false; //No revert here
					this.instance._mouseStop(e, true);
					this.instance.options.helper = this.instance.options._helper;
					
					//Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
					this.instance.currentItem.remove();
					if(this.instance.placeholder) this.instance.placeholder.remove();
					
					inst._propagate("fromSortable", e);
				}
				
			};

		});

	}
});

$.ui.plugin.add("draggable", "stack", {
	start: function(e,ui) {
		var group = $.makeArray($(ui.options.stack.group)).sort(function(a,b) {
			return (parseInt($(a).css("zIndex"),10) || ui.options.stack.min) - (parseInt($(b).css("zIndex"),10) || ui.options.stack.min);
		});
		
		$(group).each(function(i) {
			this.style.zIndex = ui.options.stack.min + i;
		});
		
		this[0].style.zIndex = ui.options.stack.min + group.length;
	}
});

})(jQuery);
/*
 * jQuery UI Droppable @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Droppables
 *
 * Depends:
 *	ui.core.js
 *	ui.draggable.js
 */
(function($) {

$.widget("ui.droppable", {
	
	_setData: function(key, value) {

		if(key == 'accept') {
			this.options.accept = value && $.isFunction(value) ? value : function(d) {
				return d.is(accept);
			};
		} else {
			$.widget.prototype._setData.apply(this, arguments);
		}

	},
	
	_init: function() {
		
		var o = this.options, accept = o.accept;
		this.isover = 0; this.isout = 1;

		this.options.accept = this.options.accept && $.isFunction(this.options.accept) ? this.options.accept : function(d) {
			return d.is(accept);
		};

		//Store the droppable's proportions
		this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
		
		// Add the reference and positions to the manager
		$.ui.ddmanager.droppables[this.options.scope] = $.ui.ddmanager.droppables[this.options.scope] || [];
		$.ui.ddmanager.droppables[this.options.scope].push(this);
		
		(this.options.cssNamespace && this.element.addClass(this.options.cssNamespace+"-droppable"));
		
	},
	plugins: {},
	ui: function(c) {
		return {
			draggable: (c.currentItem || c.element),
			helper: c.helper,
			position: c.position,
			absolutePosition: c.positionAbs,
			options: this.options,
			element: this.element
		};
	},
	destroy: function() {
		var drop = $.ui.ddmanager.droppables[this.options.scope];
		for ( var i = 0; i < drop.length; i++ )
			if ( drop[i] == this )
				drop.splice(i, 1);
		
		this.element
			.removeClass("ui-droppable-disabled")
			.removeData("droppable")
			.unbind(".droppable");
	},
	_over: function(e) {
		
		var draggable = $.ui.ddmanager.current;
		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
		
		if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
			$.ui.plugin.call(this, 'over', [e, this.ui(draggable)]);
			this.element.triggerHandler("dropover", [e, this.ui(draggable)], this.options.over);
		}
		
	},
	_out: function(e) {
		
		var draggable = $.ui.ddmanager.current;
		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
		
		if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
			$.ui.plugin.call(this, 'out', [e, this.ui(draggable)]);
			this.element.triggerHandler("dropout", [e, this.ui(draggable)], this.options.out);
		}
		
	},
	_drop: function(e,custom) {
		
		var draggable = custom || $.ui.ddmanager.current;
		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element
		
		var childrenIntersection = false;
		this.element.find(":data(droppable)").not(".ui-draggable-dragging").each(function() {
			/*var inst = $.data(this, 'droppable');
			if(inst.options.greedy && $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)) {
				childrenIntersection = true; return false;
			}*/
		});
		if(childrenIntersection) return false;
		
		if(this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
			$.ui.plugin.call(this, 'drop', [e, this.ui(draggable)]);
			this.element.triggerHandler("drop", [e, this.ui(draggable)], this.options.drop);
			return this.element;
		}
		
		return false;
		
	},
	_activate: function(e) {
		
		var draggable = $.ui.ddmanager.current;
		$.ui.plugin.call(this, 'activate', [e, this.ui(draggable)]);
		if(draggable) this.element.triggerHandler("dropactivate", [e, this.ui(draggable)], this.options.activate);
		
	},
	_deactivate: function(e) {
		
		var draggable = $.ui.ddmanager.current;
		$.ui.plugin.call(this, 'deactivate', [e, this.ui(draggable)]);
		if(draggable) this.element.triggerHandler("dropdeactivate", [e, this.ui(draggable)], this.options.deactivate);
		
	}
});

$.extend($.ui.droppable, {
	defaults: {
		disabled: false,
		tolerance: 'intersect',
		scope: 'default',
		cssNamespace: 'ui'
	}
});

$.ui.intersect = function(draggable, droppable, toleranceMode) {
	
	if (!droppable.offset) return false;
	
	var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
		y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
	var l = droppable.offset.left, r = l + droppable.proportions.width,
		t = droppable.offset.top, b = t + droppable.proportions.height;
	
	switch (toleranceMode) {
		case 'fit':
			return (l < x1 && x2 < r
				&& t < y1 && y2 < b);
			break;
		case 'intersect':
			return (l < x1 + (draggable.helperProportions.width / 2) // Right Half
				&& x2 - (draggable.helperProportions.width / 2) < r // Left Half
				&& t < y1 + (draggable.helperProportions.height / 2) // Bottom Half
				&& y2 - (draggable.helperProportions.height / 2) < b ); // Top Half
			break;
		case 'pointer':
			return (l < ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) && ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) < r
				&& t < ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) && ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) < b);
			break;
		case 'touch':
			return (
					(y1 >= t && y1 <= b) ||	// Top edge touching
					(y2 >= t && y2 <= b) ||	// Bottom edge touching
					(y1 < t && y2 > b)		// Surrounded vertically
				) && (
					(x1 >= l && x1 <= r) ||	// Left edge touching
					(x2 >= l && x2 <= r) ||	// Right edge touching
					(x1 < l && x2 > r)		// Surrounded horizontally
				);
			break;
		default:
			return false;
			break;
		}
	
};

/*
	This manager tracks offsets of draggables and droppables
*/
$.ui.ddmanager = {
	current: null,
	droppables: { 'default': [] },
	prepareOffsets: function(t, e) {
		
		var m = $.ui.ddmanager.droppables[t.options.scope];
		var type = e ? e.type : null; // workaround for #2317
		var list = (t.currentItem || t.element).find(":data(droppable)").andSelf();	

		droppablesLoop: for (var i = 0; i < m.length; i++) {
			
			if(m[i].options.disabled || (t && !m[i].options.accept.call(m[i].element,(t.currentItem || t.element)))) continue;	//No disabled and non-accepted
			for (var j=0; j < list.length; j++) { if(list[j] == m[i].element[0]) { m[i].proportions.height = 0; continue droppablesLoop; } }; //Filter out elements in the current dragged item
			m[i].visible = m[i].element.css("display") != "none"; if(!m[i].visible) continue; 									//If the element is not visible, continue
			
			m[i].offset = m[i].element.offset();
			m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
			
			if(type == "dragstart" || type == "sortactivate") m[i]._activate.call(m[i], e); 										//Activate the droppable if used directly from draggables
			
		}
		
	},
	drop: function(draggable, e) {
		
		var dropped = false;
		$.each($.ui.ddmanager.droppables[draggable.options.scope], function() {
			
			if(!this.options) return;
			if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
				dropped = this._drop.call(this, e);
			
			if (!this.options.disabled && this.visible && this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
				this.isout = 1; this.isover = 0;
				this._deactivate.call(this, e);
			}
			
		});
		return dropped;
		
	},
	drag: function(draggable, e) {
		
		//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
		if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, e);
		
		//Run through all droppables and check their positions based on specific tolerance options

		$.each($.ui.ddmanager.droppables[draggable.options.scope], function() {
			
			if(this.options.disabled || this.greedyChild || !this.visible) return;
			var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
			
			var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
			if(!c) return;
			
			var parentInstance;
			if (this.options.greedy) {
				var parent = this.element.parents(':data(droppable):eq(0)');
				if (parent.length) {
					parentInstance = $.data(parent[0], 'droppable');
					parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
				}
			}
			
			// we just moved into a greedy child
			if (parentInstance && c == 'isover') {
				parentInstance['isover'] = 0;
				parentInstance['isout'] = 1;
				parentInstance._out.call(parentInstance, e);
			}
			
			this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
			this[c == "isover" ? "_over" : "_out"].call(this, e);
			
			// we just moved out of a greedy child
			if (parentInstance && c == 'isout') {
				parentInstance['isout'] = 0;
				parentInstance['isover'] = 1;
				parentInstance._over.call(parentInstance, e);
			}
		});
		
	}
};

/*
 * Droppable Extensions
 */

$.ui.plugin.add("droppable", "activeClass", {
	activate: function(e, ui) {
		$(this).addClass(ui.options.activeClass);
	},
	deactivate: function(e, ui) {
		$(this).removeClass(ui.options.activeClass);
	},
	drop: function(e, ui) {
		$(this).removeClass(ui.options.activeClass);
	}
});

$.ui.plugin.add("droppable", "hoverClass", {
	over: function(e, ui) {
		$(this).addClass(ui.options.hoverClass);
	},
	out: function(e, ui) {
		$(this).removeClass(ui.options.hoverClass);
	},
	drop: function(e, ui) {
		$(this).removeClass(ui.options.hoverClass);
	}
});

})(jQuery);
/*
 * jQuery UI Selectable @VERSION
 *
 * Copyright (c) 2008 Richard D. Worth (rdworth.org)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Selectables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

$.widget("ui.selectable", $.extend({}, $.ui.mouse, {
	_init: function() {
		var self = this;
		
		this.element.addClass("ui-selectable");
		
		this.dragged = false;

		// cache selectee children based on filter
		var selectees;
		this.refresh = function() {
			selectees = $(self.options.filter, self.element[0]);
			selectees.each(function() {
				var $this = $(this);
				var pos = $this.offset();
				$.data(this, "selectable-item", {
					element: this,
					$element: $this,
					left: pos.left,
					top: pos.top,
					right: pos.left + $this.width(),
					bottom: pos.top + $this.height(),
					startselected: false,
					selected: $this.hasClass('ui-selected'),
					selecting: $this.hasClass('ui-selecting'),
					unselecting: $this.hasClass('ui-unselecting')
				});
			});
		};
		this.refresh();

		this.selectees = selectees.addClass("ui-selectee");
		
		this._mouseInit();
		
		this.helper = $(document.createElement('div'))
			.css({border:'1px dotted black'})
			.addClass("ui-selectable-helper");
	},
	toggle: function() {
		if(this.options.disabled){
			this.enable();
		} else {
			this.disable();
		}
	},
	destroy: function() {
		this.element
			.removeClass("ui-selectable ui-selectable-disabled")
			.removeData("selectable")
			.unbind(".selectable");
		this._mouseDestroy();
	},
	_mouseStart: function(e) {
		var self = this;
		
		this.opos = [e.pageX, e.pageY];
		
		if (this.options.disabled)
			return;

		var options = this.options;

		this.selectees = $(options.filter, this.element[0]);

		// selectable START callback
		this.element.triggerHandler("selectablestart", [e, {
			"selectable": this.element[0],
			"options": options
		}], options.start);

		$('body').append(this.helper);
		// position helper (lasso)
		this.helper.css({
			"z-index": 100,
			"position": "absolute",
			"left": e.clientX,
			"top": e.clientY,
			"width": 0,
			"height": 0
		});

		if (options.autoRefresh) {
			this.refresh();
		}

		this.selectees.filter('.ui-selected').each(function() {
			var selectee = $.data(this, "selectable-item");
			selectee.startselected = true;
			if (!e.metaKey) {
				selectee.$element.removeClass('ui-selected');
				selectee.selected = false;
				selectee.$element.addClass('ui-unselecting');
				selectee.unselecting = true;
				// selectable UNSELECTING callback
				self.element.triggerHandler("selectableunselecting", [e, {
					selectable: self.element[0],
					unselecting: selectee.element,
					options: options
				}], options.unselecting);
			}
		});
		
		var isSelectee = false;
		$(e.target).parents().andSelf().each(function() {
			if($.data(this, "selectable-item")) isSelectee = true;
		});
		return this.options.keyboard ? !isSelectee : true;
	},
	_mouseDrag: function(e) {
		var self = this;
		this.dragged = true;
		
		if (this.options.disabled)
			return;

		var options = this.options;

		var x1 = this.opos[0], y1 = this.opos[1], x2 = e.pageX, y2 = e.pageY;
		if (x1 > x2) { var tmp = x2; x2 = x1; x1 = tmp; }
		if (y1 > y2) { var tmp = y2; y2 = y1; y1 = tmp; }
		this.helper.css({left: x1, top: y1, width: x2-x1, height: y2-y1});

		this.selectees.each(function() {
			var selectee = $.data(this, "selectable-item");
			//prevent helper from being selected if appendTo: selectable
			if (!selectee || selectee.element == self.element[0])
				return;
			var hit = false;
			if (options.tolerance == 'touch') {
				hit = ( !(selectee.left > x2 || selectee.right < x1 || selectee.top > y2 || selectee.bottom < y1) );
			} else if (options.tolerance == 'fit') {
				hit = (selectee.left > x1 && selectee.right < x2 && selectee.top > y1 && selectee.bottom < y2);
			}

			if (hit) {
				// SELECT
				if (selectee.selected) {
					selectee.$element.removeClass('ui-selected');
					selectee.selected = false;
				}
				if (selectee.unselecting) {
					selectee.$element.removeClass('ui-unselecting');
					selectee.unselecting = false;
				}
				if (!selectee.selecting) {
					selectee.$element.addClass('ui-selecting');
					selectee.selecting = true;
					// selectable SELECTING callback
					self.element.triggerHandler("selectableselecting", [e, {
						selectable: self.element[0],
						selecting: selectee.element,
						options: options
					}], options.selecting);
				}
			} else {
				// UNSELECT
				if (selectee.selecting) {
					if (e.metaKey && selectee.startselected) {
						selectee.$element.removeClass('ui-selecting');
						selectee.selecting = false;
						selectee.$element.addClass('ui-selected');
						selectee.selected = true;
					} else {
						selectee.$element.removeClass('ui-selecting');
						selectee.selecting = false;
						if (selectee.startselected) {
							selectee.$element.addClass('ui-unselecting');
							selectee.unselecting = true;
						}
						// selectable UNSELECTING callback
						self.element.triggerHandler("selectableunselecting", [e, {
							selectable: self.element[0],
							unselecting: selectee.element,
							options: options
						}], options.unselecting);
					}
				}
				if (selectee.selected) {
					if (!e.metaKey && !selectee.startselected) {
						selectee.$element.removeClass('ui-selected');
						selectee.selected = false;

						selectee.$element.addClass('ui-unselecting');
						selectee.unselecting = true;
						// selectable UNSELECTING callback
						self.element.triggerHandler("selectableunselecting", [e, {
							selectable: self.element[0],
							unselecting: selectee.element,
							options: options
						}], options.unselecting);
					}
				}
			}
		});
		
		return false;
	},
	_mouseStop: function(e) {
		var self = this;
		
		this.dragged = false;
		
		var options = this.options;

		$('.ui-unselecting', this.element[0]).each(function() {
			var selectee = $.data(this, "selectable-item");
			selectee.$element.removeClass('ui-unselecting');
			selectee.unselecting = false;
			selectee.startselected = false;
			self.element.triggerHandler("selectableunselected", [e, {
				selectable: self.element[0],
				unselected: selectee.element,
				options: options
			}], options.unselected);
		});
		$('.ui-selecting', this.element[0]).each(function() {
			var selectee = $.data(this, "selectable-item");
			selectee.$element.removeClass('ui-selecting').addClass('ui-selected');
			selectee.selecting = false;
			selectee.selected = true;
			selectee.startselected = true;
			self.element.triggerHandler("selectableselected", [e, {
				selectable: self.element[0],
				selected: selectee.element,
				options: options
			}], options.selected);
		});
		this.element.triggerHandler("selectablestop", [e, {
			selectable: self.element[0],
			options: this.options
		}], this.options.stop);
		
		this.helper.remove();
		
		return false;
	}
}));

$.extend($.ui.selectable, {
	defaults: {
		distance: 1,
		delay: 0,
		cancel: ":input",
		appendTo: 'body',
		autoRefresh: true,
		filter: '*',
		tolerance: 'touch'
	}
});

})(jQuery);
/*
 * jQuery UI Sortable @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Sortables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

function contains(a, b) { 
    var safari2 = $.browser.safari && $.browser.version < 522; 
    if (a.contains && !safari2) { 
        return a.contains(b); 
    } 
    if (a.compareDocumentPosition) 
        return !!(a.compareDocumentPosition(b) & 16); 
    while (b = b.parentNode) 
          if (b == a) return true; 
    return false; 
};

$.widget("ui.sortable", $.extend({}, $.ui.mouse, {
	_init: function() {

		var o = this.options;
		this.containerCache = {};
		this.element.addClass("ui-sortable");
	
		//Get the items
		this.refresh();

		//Let's determine if the items are floating
		this.floating = this.items.length ? (/left|right/).test(this.items[0].item.css('float')) : false;
		
		//Let's determine the parent's offset
		this.offset = this.element.offset();

		//Initialize mouse events for interaction
		this._mouseInit();
		
	},
	plugins: {},
	ui: function(inst) {
		return {
			helper: (inst || this)["helper"],
			placeholder: (inst || this)["placeholder"] || $([]),
			position: (inst || this)["position"],
			absolutePosition: (inst || this)["positionAbs"],
			options: this.options,
			element: this.element,
			item: (inst || this)["currentItem"],
			sender: inst ? inst.element : null
		};		
	},
	
	_propagate: function(n,e,inst, noPropagation) {
		$.ui.plugin.call(this, n, [e, this.ui(inst)]);
		if(!noPropagation) this.element.triggerHandler(n == "sort" ? n : "sort"+n, [e, this.ui(inst)], this.options[n]);
	},
	
	serialize: function(o) {

		var items = this._getItemsAsjQuery(o && o.connected);
		var str = []; o = o || {};
		
		$(items).each(function() {
			var res = ($(this.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
			if(res) str.push((o.key || res[1]+'[]')+'='+(o.key && o.expression ? res[1] : res[2]));
		});
		
		return str.join('&');
		
	},
	
	toArray: function(o) {
		
		var items = this._getItemsAsjQuery(o && o.connected);
		var ret = [];

		items.each(function() { ret.push($(this).attr(o.attr || 'id')); });
		return ret;
		
	},
	
	/* Be careful with the following core functions */
	_intersectsWith: function(item) {
		var x1 = this.positionAbs.left, x2 = x1 + this.helperProportions.width,
		y1 = this.positionAbs.top, y2 = y1 + this.helperProportions.height;
		var l = item.left, r = l + item.width, 
		t = item.top, b = t + item.height;
		
		var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
		var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;
		
		if(this.options.tolerance == "pointer" || this.options.forcePointerForContainers || (this.options.tolerance == "guess" && this.helperProportions[this.floating ? 'width' : 'height'] > item[this.floating ? 'width' : 'height'])) {
			return isOverElement;
		} else {
		
			return (l < x1 + (this.helperProportions.width / 2) // Right Half
				&& x2 - (this.helperProportions.width / 2) < r // Left Half
				&& t < y1 + (this.helperProportions.height / 2) // Bottom Half
				&& y2 - (this.helperProportions.height / 2) < b ); // Top Half
		
		}
	},
	
	_intersectsWithEdge: function(item) {	
		var x1 = this.positionAbs.left, x2 = x1 + this.helperProportions.width,
			y1 = this.positionAbs.top, y2 = y1 + this.helperProportions.height;
		
		var l = item.left, r = l + item.width, 
			t = item.top, b = t + item.height;
		
		var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
		var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;
		
		if(this.options.tolerance == "pointer" || (this.options.tolerance == "guess" && this.helperProportions[this.floating ? 'width' : 'height'] > item[this.floating ? 'width' : 'height'])) {
			if(!isOverElement) return false;

			if(this.floating) {
				if ((x1 + dxClick) > l && (x1 + dxClick) < l + item.width/2) return 2;
				if ((x1 + dxClick) > l + item.width/2 && (x1 + dxClick) < r) return 1;
			} else {
				var height = item.height;
				var direction = y1 - this.updateOriginalPosition.top < 0 ? 2 : 1; // 2 = up
				
				if (direction == 1 && (y1 + dyClick) < t + height/2) { return 2; } // up
				else if (direction == 2 && (y1 + dyClick) > t + height/2) { return 1; } // down
			}

		} else {
			if (!(l < x1 + (this.helperProportions.width / 2) // Right Half
				&& x2 - (this.helperProportions.width / 2) < r // Left Half
				&& t < y1 + (this.helperProportions.height / 2) // Bottom Half
				&& y2 - (this.helperProportions.height / 2) < b )) return false; // Top Half
			
			if(this.floating) {
				if(x2 > l && x1 < l) return 2; //Crosses left edge
				if(x1 < r && x2 > r) return 1; //Crosses right edge
			} else {
				if(y2 > t && y1 < t) return 1; //Crosses top edge
				if(y1 < b && y2 > b) return 2; //Crosses bottom edge
			}
		}
		
		return false;
		
	},
	
	refresh: function() {
		this._refreshItems();
		this.refreshPositions();
	},
	
	_getItemsAsjQuery: function(connected) {
		
		var self = this;
		var items = [];
		var queries = [];
	
		if(this.options.connectWith && connected) {
			for (var i = this.options.connectWith.length - 1; i >= 0; i--){
				var cur = $(this.options.connectWith[i]);
				for (var j = cur.length - 1; j >= 0; j--){
					var inst = $.data(cur[j], 'sortable');
					if(inst && inst != this && !inst.options.disabled) {
						queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper"), inst]);
					}
				};
			};
		}
		
		queries.push([$.isFunction(this.options.items) ? this.options.items.call(this.element, null, { options: this.options, item: this.currentItem }) : $(this.options.items, this.element).not(".ui-sortable-helper"), this]);

		for (var i = queries.length - 1; i >= 0; i--){
			queries[i][0].each(function() {
				items.push(this);
			});
		};
		
		return $(items);
		
	},
	
	_removeCurrentsFromItems: function() {
			
		var list = this.currentItem.find(":data(sortable-item)");	
	
		for (var i=0; i < this.items.length; i++) {
			
			for (var j=0; j < list.length; j++) {
				if(list[j] == this.items[i].item[0])
					this.items.splice(i,1);
			};
		
		};
		
	},
	
	_refreshItems: function() {
		
		this.items = [];
		this.containers = [this];
		var items = this.items;
		var self = this;
		var queries = [[$.isFunction(this.options.items) ? this.options.items.call(this.element, null, { options: this.options, item: this.currentItem }) : $(this.options.items, this.element), this]];
	
		if(this.options.connectWith) {
			for (var i = this.options.connectWith.length - 1; i >= 0; i--){
				var cur = $(this.options.connectWith[i]);
				for (var j = cur.length - 1; j >= 0; j--){
					var inst = $.data(cur[j], 'sortable');
					if(inst && inst != this && !inst.options.disabled) {
						queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element), inst]);
						this.containers.push(inst);
					}
				};
			};
		}

		for (var i = queries.length - 1; i >= 0; i--){
			queries[i][0].each(function() {
				$.data(this, 'sortable-item', queries[i][1]); // Data for target checking (mouse manager)
				items.push({
					item: $(this),
					instance: queries[i][1],
					width: 0, height: 0,
					left: 0, top: 0
				});
			});
		};

	},
	
	refreshPositions: function(fast) {

		//This has to be redone because due to the item being moved out/into the offsetParent, the offsetParent's position will change
		if(this.offsetParent) {
			var po = this.offsetParent.offset();
			this.offset.parent = { top: po.top + this.offsetParentBorders.top, left: po.left + this.offsetParentBorders.left };
		}

		for (var i = this.items.length - 1; i >= 0; i--){		
			
			//We ignore calculating positions of all connected containers when we're not over them
			if(this.items[i].instance != this.currentContainer && this.currentContainer && this.items[i].item[0] != this.currentItem[0])
				continue;
				
			var t = this.options.toleranceElement ? $(this.options.toleranceElement, this.items[i].item) : this.items[i].item;
			
			if(!fast) {
				this.items[i].width = t[0].offsetWidth;
				this.items[i].height = t[0].offsetHeight;
			}
			
			var p = t.offset();
			this.items[i].left = p.left;
			this.items[i].top = p.top;
			
		};

		if(this.options.custom && this.options.custom.refreshContainers) {
			this.options.custom.refreshContainers.call(this);
		} else {
			for (var i = this.containers.length - 1; i >= 0; i--){
				var p =this.containers[i].element.offset();
				this.containers[i].containerCache.left = p.left;
				this.containers[i].containerCache.top = p.top;
				this.containers[i].containerCache.width	= this.containers[i].element.outerWidth();
				this.containers[i].containerCache.height = this.containers[i].element.outerHeight();
			};
		}

	},
	
	destroy: function() {
		this.element
			.removeClass("ui-sortable ui-sortable-disabled")
			.removeData("sortable")
			.unbind(".sortable");
		this._mouseDestroy();
		
		for ( var i = this.items.length - 1; i >= 0; i-- )
			this.items[i].item.removeData("sortable-item");
	},
	
	_createPlaceholder: function(that) {
		
		var self = that || this, o = self.options;

		if(!o.placeholder || o.placeholder.constructor == String) {
			var className = o.placeholder;
			o.placeholder = {
				element: function() {
					var el = $(document.createElement(self.currentItem[0].nodeName)).addClass(className || "ui-sortable-placeholder")[0];

					if(!className) {
						el.style.visibility = "hidden";
						document.body.appendChild(el);
						el.innerHTML = self.currentItem[0].innerHTML;
						document.body.removeChild(el);
					};

					return el;
				},
				update: function(container, p) {
					if(className && !o.forcePlaceholderSize) return;
					if(!p.height()) { p.height(self.currentItem.innerHeight() - parseInt(self.currentItem.css('paddingTop')||0, 10) - parseInt(self.currentItem.css('paddingBottom')||0, 10)); };
					if(!p.width()) { p.width(self.currentItem.innerWidth() - parseInt(self.currentItem.css('paddingLeft')||0, 10) - parseInt(self.currentItem.css('paddingRight')||0, 10)); };
				}
			};
		}
		
		self.placeholder = $(o.placeholder.element.call(self.element, self.currentItem))
		self.currentItem.parent()[0].appendChild(self.placeholder[0]);
		self.placeholder[0].parentNode.insertBefore(self.placeholder[0], self.currentItem[0]);
		o.placeholder.update(self, self.placeholder);
	},
	
	_contactContainers: function(e) {
		for (var i = this.containers.length - 1; i >= 0; i--){

			if(this._intersectsWith(this.containers[i].containerCache)) {
				if(!this.containers[i].containerCache.over) {
					

					if(this.currentContainer != this.containers[i]) {
						
						//When entering a new container, we will find the item with the least distance and append our item near it
						var dist = 10000; var itemWithLeastDistance = null; var base = this.positionAbs[this.containers[i].floating ? 'left' : 'top'];
						for (var j = this.items.length - 1; j >= 0; j--) {
							if(!contains(this.containers[i].element[0], this.items[j].item[0])) continue;
							var cur = this.items[j][this.containers[i].floating ? 'left' : 'top'];
							if(Math.abs(cur - base) < dist) {
								dist = Math.abs(cur - base); itemWithLeastDistance = this.items[j];
							}
						}
						
						if(!itemWithLeastDistance && !this.options.dropOnEmpty) //Check if dropOnEmpty is enabled
							continue;
						
						this.currentContainer = this.containers[i];
						itemWithLeastDistance ? this.options.sortIndicator.call(this, e, itemWithLeastDistance, null, true) : this.options.sortIndicator.call(this, e, null, this.containers[i].element, true);
						this._propagate("change", e); //Call plugins and callbacks
						this.containers[i]._propagate("change", e, this); //Call plugins and callbacks
						
						//Update the placeholder
						this.options.placeholder.update(this.currentContainer, this.placeholder);

					}
					
					this.containers[i]._propagate("over", e, this);
					this.containers[i].containerCache.over = 1;
				}
			} else {
				if(this.containers[i].containerCache.over) {
					this.containers[i]._propagate("out", e, this);
					this.containers[i].containerCache.over = 0;
				}
			}
			
		};			
	},
	
	_mouseCapture: function(e, overrideHandle) {

		if(this.options.disabled || this.options.type == 'static') return false;

		//We have to refresh the items data once first
		this._refreshItems();

		//Find out if the clicked node (or one of its parents) is a actual item in this.items
		var currentItem = null, self = this, nodes = $(e.target).parents().each(function() {	
			if($.data(this, 'sortable-item') == self) {
				currentItem = $(this);
				return false;
			}
		});
		if($.data(e.target, 'sortable-item') == self) currentItem = $(e.target);

		if(!currentItem) return false;
		if(this.options.handle && !overrideHandle) {
			var validHandle = false;
			
			$(this.options.handle, currentItem).find("*").andSelf().each(function() { if(this == e.target) validHandle = true; });
			if(!validHandle) return false;
		}
			
		this.currentItem = currentItem;
		this._removeCurrentsFromItems();
		return true;	
			
	},
	
	createHelper: function(e) {
		
		var o = this.options;
		var helper = typeof o.helper == 'function' ? $(o.helper.apply(this.element[0], [e, this.currentItem])) : (o.helper == "original" ? this.currentItem :  this.currentItem.clone());
		
		if (!helper.parents('body').length)
			$(o.appendTo != 'parent' ? o.appendTo : this.currentItem[0].parentNode)[0].appendChild(helper[0]); //Add the helper to the DOM if that didn't happen already
			
		return helper;

	},
	
	_mouseStart: function(e, overrideHandle, noActivation) {

		var o = this.options;
		this.currentContainer = this;

		//We only need to call refreshPositions, because the refreshItems call has been moved to mouseCapture
		this.refreshPositions();

		//Create and append the visible helper	
		this.helper = this.createHelper(e);		

		/*
		 * - Position generation -
		 * This block generates everything position related - it's the core of draggables.
		 */

		this.margins = {																				//Cache the margins
			left: (parseInt(this.currentItem.css("marginLeft"),10) || 0),
			top: (parseInt(this.currentItem.css("marginTop"),10) || 0)
		};		
	
		this.offset = this.currentItem.offset();														//The element's absolute position on the page
		this.offset = {																					//Substract the margins from the element's absolute offset
			top: this.offset.top - this.margins.top,
			left: this.offset.left - this.margins.left
		};
		
		this.offset.click = {																			//Where the click happened, relative to the element
			left: e.pageX - this.offset.left,
			top: e.pageY - this.offset.top
		};
		
		this.offsetParent = this.helper.offsetParent();													//Get the offsetParent and cache its position
		var po = this.offsetParent.offset();			

		this.offsetParentBorders = {
			top: (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
			left: (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
		};
		
		this.offset.parent = {																			//Store its position plus border
			top: po.top + this.offsetParentBorders.top,
			left: po.left + this.offsetParentBorders.left
		};
	
		this.updateOriginalPosition = this.originalPosition = this._generatePosition(e);				//Generate the original position
		this.domPosition = { prev: this.currentItem.prev()[0], parent: this.currentItem.parent()[0] };  //Cache the former DOM position
		
		//If o.placeholder is used, create a new element at the given position with the class
		this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };//Cache the helper size


		if(o.helper == "original") {
			this._storedCSS = { position: this.currentItem.css("position"), top: this.currentItem.css("top"), left: this.currentItem.css("left"), clear: this.currentItem.css("clear") };
		} else {
			this.currentItem.hide(); //Hide the original, won't cause anything bad this way
		}

		//Position it absolutely and add a helper class
		this.helper
			.css({ position: 'absolute', clear: 'both' })
			.addClass('ui-sortable-helper');
		
		//Create the placeholder	
		this._createPlaceholder();

		//Call plugins and callbacks
		this._propagate("start", e);
		
		//Recache the helper size
		if(!this._preserveHelperProportions)
			this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() };
		
		if(o.cursorAt) {
			if(o.cursorAt.left != undefined) this.offset.click.left = o.cursorAt.left;
			if(o.cursorAt.right != undefined) this.offset.click.left = this.helperProportions.width - o.cursorAt.right;
			if(o.cursorAt.top != undefined) this.offset.click.top = o.cursorAt.top;
			if(o.cursorAt.bottom != undefined) this.offset.click.top = this.helperProportions.height - o.cursorAt.bottom;
		}

		/*
		 * - Position constraining -
		 * Here we prepare position constraining like grid and containment.
		 */	
		
		if(o.containment) {
			if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
			if(o.containment == 'document' || o.containment == 'window') this.containment = [
				0 - this.offset.parent.left,
				0 - this.offset.parent.top,
				$(o.containment == 'document' ? document : window).width() - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0),
				($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0)
			];

			if(!(/^(document|window|parent)$/).test(o.containment)) {
				var ce = $(o.containment)[0];
				var co = $(o.containment).offset();
				var over = ($(ce).css("overflow") != 'hidden');
				
				this.containment = [
					co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.parent.left,
					co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.parent.top,
					co.left+(over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.currentItem.css("marginRight"),10) || 0),
					co.top+(over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.currentItem.css("marginBottom"),10) || 0)
				];
			}
		}
		
		//Post 'activate' events to possible containers
		if(!noActivation) {
			 for (var i = this.containers.length - 1; i >= 0; i--) { this.containers[i]._propagate("activate", e, this); }
		}
		
		//Prepare possible droppables
		if($.ui.ddmanager)
			$.ui.ddmanager.current = this;
		
		if ($.ui.ddmanager && !o.dropBehaviour)
			$.ui.ddmanager.prepareOffsets(this, e);

		this.dragging = true;

		this._mouseDrag(e); //Execute the drag once - this causes the helper not to be visible before getting its correct position
		return true;


	},
	
	_convertPositionTo: function(d, pos) {
		if(!pos) pos = this.position;
		var mod = d == "absolute" ? 1 : -1;
		return {
			top: (
				pos.top																	// the calculated relative position
				+ this.offset.parent.top * mod											// The offsetParent's offset without borders (offset + border)
				- (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop) * mod	// The offsetParent's scroll position
				+ this.margins.top * mod												//Add the margin (you don't want the margin counting in intersection methods)
			),
			left: (
				pos.left																// the calculated relative position
				+ this.offset.parent.left * mod											// The offsetParent's offset without borders (offset + border)
				- (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft) * mod	// The offsetParent's scroll position
				+ this.margins.left * mod												//Add the margin (you don't want the margin counting in intersection methods)
			)
		};
	},
	
	_generatePosition: function(e) {
		
		var o = this.options;
		var position = {
			top: (
				e.pageY																	// The absolute mouse position
				- this.offset.click.top													// Click offset (relative to the element)
				- this.offset.parent.top												// The offsetParent's offset without borders (offset + border)
				+ (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)	// The offsetParent's scroll position, not if the element is fixed
			),
			left: (
				e.pageX																	// The absolute mouse position
				- this.offset.click.left												// Click offset (relative to the element)
				- this.offset.parent.left												// The offsetParent's offset without borders (offset + border)
				+ (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft)	// The offsetParent's scroll position, not if the element is fixed
			)
		};
		
		if(!this.originalPosition) return position;										//If we are not dragging yet, we won't check for options
		
		/*
		 * - Position constraining -
		 * Constrain the position to a mix of grid, containment.
		 */
		if(this.containment) {
			if(position.left < this.containment[0]) position.left = this.containment[0];
			if(position.top < this.containment[1]) position.top = this.containment[1];
			if(position.left > this.containment[2]) position.left = this.containment[2];
			if(position.top > this.containment[3]) position.top = this.containment[3];
		}
		
		if(o.grid) {
			var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1];
			position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
			
			var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0];
			position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
		}
		
		return position;
	},
	
	_mouseDrag: function(e) {

		//Compute the helpers position
		this.position = this._generatePosition(e);
		this.positionAbs = this._convertPositionTo("absolute");

		//Call the internal plugins
		$.ui.plugin.call(this, "sort", [e, this.ui()]);
		
		//Regenerate the absolute position used for position checks
		this.positionAbs = this._convertPositionTo("absolute");
		
		//Set the helper's position
		this.helper[0].style.left = this.position.left+'px';
		this.helper[0].style.top = this.position.top+'px';

		//Rearrange
		for (var i = this.items.length - 1; i >= 0; i--) {
			var intersection = this._intersectsWithEdge(this.items[i]);
			if(!intersection) continue;
			
			if(this.items[i].item[0] != this.currentItem[0] //cannot intersect with itself
				&&	this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != this.items[i].item[0] //no useless actions that have been done before
				&&	!contains(this.placeholder[0], this.items[i].item[0]) //no action if the item moved is the parent of the item checked
				&& (this.options.type == 'semi-dynamic' ? !contains(this.element[0], this.items[i].item[0]) : true)
			) {
				
				this.updateOriginalPosition = this._generatePosition(e);
				
				this.direction = intersection == 1 ? "down" : "up";
				this.options.sortIndicator.call(this, e, this.items[i]);
				this._propagate("change", e); //Call plugins and callbacks
				break;
			}
		}
		
		//Post events to containers
		this._contactContainers(e);
		
		//Interconnect with droppables
		if($.ui.ddmanager) $.ui.ddmanager.drag(this, e);

		//Call callbacks
		this.element.triggerHandler("sort", [e, this.ui()], this.options["sort"]);

		return false;
		
	},
	
	_rearrange: function(e, i, a, hardRefresh) {

		a ? a[0].appendChild(this.placeholder[0]) : i.item[0].parentNode.insertBefore(this.placeholder[0], (this.direction == 'down' ? i.item[0] : i.item[0].nextSibling));
		
		//Various things done here to improve the performance:
		// 1. we create a setTimeout, that calls refreshPositions
		// 2. on the instance, we have a counter variable, that get's higher after every append
		// 3. on the local scope, we copy the counter variable, and check in the timeout, if it's still the same
		// 4. this lets only the last addition to the timeout stack through
		this.counter = this.counter ? ++this.counter : 1;
		var self = this, counter = this.counter;

		window.setTimeout(function() {
			if(counter == self.counter) self.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
		},0);

	},
	
	_mouseStop: function(e, noPropagation) {

		//If we are using droppables, inform the manager about the drop
		if ($.ui.ddmanager && !this.options.dropBehaviour)
			$.ui.ddmanager.drop(this, e);
			
		if(this.options.revert) {
			var self = this;
			var cur = self.placeholder.offset();

			$(this.helper).animate({
				left: cur.left - this.offset.parent.left - self.margins.left + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft),
				top: cur.top - this.offset.parent.top - self.margins.top + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)
			}, parseInt(this.options.revert, 10) || 500, function() {
				self._clear(e);
			});
		} else {
			this._clear(e, noPropagation);
		}

		return false;
		
	},
	
	_clear: function(e, noPropagation) {

		//We first have to update the dom position of the actual currentItem
		if(!this._noFinalSort) this.placeholder.before(this.currentItem);
		this._noFinalSort = null;

		if(this.options.helper == "original")
			this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
		else
			this.currentItem.show();

		if(this.domPosition.prev != this.currentItem.prev().not(".ui-sortable-helper")[0] || this.domPosition.parent != this.currentItem.parent()[0]) this._propagate("update", e, null, noPropagation); //Trigger update callback if the DOM position has changed
		if(!contains(this.element[0], this.currentItem[0])) { //Node was moved out of the current element
			this._propagate("remove", e, null, noPropagation);
			for (var i = this.containers.length - 1; i >= 0; i--){
				if(contains(this.containers[i].element[0], this.currentItem[0])) {
					this.containers[i]._propagate("update", e, this, noPropagation);
					this.containers[i]._propagate("receive", e, this, noPropagation);
				}
			};
		};
		
		//Post events to containers
		for (var i = this.containers.length - 1; i >= 0; i--){
			this.containers[i]._propagate("deactivate", e, this, noPropagation);
			if(this.containers[i].containerCache.over) {
				this.containers[i]._propagate("out", e, this);
				this.containers[i].containerCache.over = 0;
			}
		}
		
		this.dragging = false;
		if(this.cancelHelperRemoval) {
			this._propagate("beforeStop", e, null, noPropagation);
			this._propagate("stop", e, null, noPropagation);
			return false;
		}
		
		this._propagate("beforeStop", e, null, noPropagation);
		
		this.placeholder.remove();
		if(this.options.helper != "original") this.helper.remove(); this.helper = null;
		this._propagate("stop", e, null, noPropagation);
		
		return true;
		
	}
}));

$.extend($.ui.sortable, {
	getter: "serialize toArray",
	defaults: {
		helper: "original",
		tolerance: "guess",
		distance: 1,
		delay: 0,
		scroll: true,
		scrollSensitivity: 20,
		scrollSpeed: 20,
		cancel: ":input",
		items: '> *',
		zIndex: 1000,
		dropOnEmpty: true,
		appendTo: "parent",
		sortIndicator: $.ui.sortable.prototype._rearrange,
		scope: "default",
		forcePlaceholderSize: false
	}
});

/*
 * Sortable Extensions
 */

$.ui.plugin.add("sortable", "cursor", {
	start: function(e, ui) {
		var t = $('body');
		if (t.css("cursor")) ui.options._cursor = t.css("cursor");
		t.css("cursor", ui.options.cursor);
	},
	beforeStop: function(e, ui) {
		if (ui.options._cursor) $('body').css("cursor", ui.options._cursor);
	}
});

$.ui.plugin.add("sortable", "zIndex", {
	start: function(e, ui) {
		var t = ui.helper;
		if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex");
		t.css('zIndex', ui.options.zIndex);
	},
	beforeStop: function(e, ui) {
		if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex);
	}
});

$.ui.plugin.add("sortable", "opacity", {
	start: function(e, ui) {
		var t = ui.helper;
		if(t.css("opacity")) ui.options._opacity = t.css("opacity");
		t.css('opacity', ui.options.opacity);
	},
	beforeStop: function(e, ui) {
		if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity);
	}
});

$.ui.plugin.add("sortable", "scroll", {
	start: function(e, ui) {
		var o = ui.options;
		var i = $(this).data("sortable");
	
		i.overflowY = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-y'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(i.currentItem);
		i.overflowX = function(el) {
			do { if(/auto|scroll/.test(el.css('overflow')) || (/auto|scroll/).test(el.css('overflow-x'))) return el; el = el.parent(); } while (el[0].parentNode);
			return $(document);
		}(i.currentItem);
		
		if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') i.overflowYOffset = i.overflowY.offset();
		if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') i.overflowXOffset = i.overflowX.offset();
		
	},
	sort: function(e, ui) {
		
		var o = ui.options;
		var i = $(this).data("sortable");
		
		if(i.overflowY[0] != document && i.overflowY[0].tagName != 'HTML') {
			if((i.overflowYOffset.top + i.overflowY[0].offsetHeight) - e.pageY < o.scrollSensitivity)
				i.overflowY[0].scrollTop = i.overflowY[0].scrollTop + o.scrollSpeed;
			if(e.pageY - i.overflowYOffset.top < o.scrollSensitivity)
				i.overflowY[0].scrollTop = i.overflowY[0].scrollTop - o.scrollSpeed;
		} else {
			if(e.pageY - $(document).scrollTop() < o.scrollSensitivity)
				$(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
			if($(window).height() - (e.pageY - $(document).scrollTop()) < o.scrollSensitivity)
				$(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
		}
		
		if(i.overflowX[0] != document && i.overflowX[0].tagName != 'HTML') {
			if((i.overflowXOffset.left + i.overflowX[0].offsetWidth) - e.pageX < o.scrollSensitivity)
				i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft + o.scrollSpeed;
			if(e.pageX - i.overflowXOffset.left < o.scrollSensitivity)
				i.overflowX[0].scrollLeft = i.overflowX[0].scrollLeft - o.scrollSpeed;
		} else {
			if(e.pageX - $(document).scrollLeft() < o.scrollSensitivity)
				$(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
			if($(window).width() - (e.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
				$(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
		}
		
	}
});

$.ui.plugin.add("sortable", "axis", {
	sort: function(e, ui) {
		
		var i = $(this).data("sortable");
		
		if(ui.options.axis == "y") i.position.left = i.originalPosition.left;
		if(ui.options.axis == "x") i.position.top = i.originalPosition.top;
		
	}
});

})(jQuery);
/*
 * jQuery UI Datepicker @VERSION
 *
 * Copyright (c) 2006, 2007, 2008 Marc Grabanski
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Datepicker
 *
 * Depends:
 *	ui.core.js
 *
 * Marc Grabanski (m@marcgrabanski.com) and Keith Wood (kbwood@virginbroadband.com.au).
 */
   
(function($) { // hide the namespace

var PROP_NAME = 'datepicker';

/* Date picker manager.
   Use the singleton instance of this class, $.datepicker, to interact with the date picker.
   Settings for (groups of) date pickers are maintained in an instance object,
   allowing multiple different settings on the same page. */

function Datepicker() {
	this.debug = false; // Change this to true to start debugging
	this._curInst = null; // The current instance in use
	this._disabledInputs = []; // List of date picker inputs that have been disabled
	this._datepickerShowing = false; // True if the popup picker is showing , false if not
	this._inDialog = false; // True if showing within a "dialog", false if not
	this._mainDivId = 'ui-datepicker-div'; // The ID of the main datepicker division
	this._inlineClass = 'ui-datepicker-inline'; // The name of the inline marker class
	this._appendClass = 'ui-datepicker-append'; // The name of the append marker class
	this._triggerClass = 'ui-datepicker-trigger'; // The name of the trigger marker class
	this._dialogClass = 'ui-datepicker-dialog'; // The name of the dialog marker class
	this._promptClass = 'ui-datepicker-prompt'; // The name of the dialog prompt marker class
	this._disableClass = 'ui-datepicker-disabled'; // The name of the disabled covering marker class
	this._unselectableClass = 'ui-datepicker-unselectable'; // The name of the unselectable cell marker class
	this._currentClass = 'ui-datepicker-current-day'; // The name of the current day marker class
	this.regional = []; // Available regional settings, indexed by language code
	this.regional[''] = { // Default regional settings
		clearText: 'Clear', // Display text for clear link
		clearStatus: 'Erase the current date', // Status text for clear link
		closeText: 'Close', // Display text for close link
		closeStatus: 'Close without change', // Status text for close link
		prevText: '&#x3c;Prev', // Display text for previous month link
		prevStatus: 'Show the previous month', // Status text for previous month link
		prevBigText: '&#x3c;&#x3c;', // Display text for previous year link
		prevBigStatus: 'Show the previous year', // Status text for previous year link
		nextText: 'Next&#x3e;', // Display text for next month link
		nextStatus: 'Show the next month', // Status text for next month link
		nextBigText: '&#x3e;&#x3e;', // Display text for next year link
		nextBigStatus: 'Show the next year', // Status text for next year link
		currentText: 'Today', // Display text for current month link
		currentStatus: 'Show the current month', // Status text for current month link
		monthNames: ['January','February','March','April','May','June',
			'July','August','September','October','November','December'], // Names of months for drop-down and formatting
		monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], // For formatting
		monthStatus: 'Show a different month', // Status text for selecting a month
		yearStatus: 'Show a different year', // Status text for selecting a year
		weekHeader: 'Wk', // Header for the week of the year column
		weekStatus: 'Week of the year', // Status text for the week of the year column
		dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'], // For formatting
		dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'], // For formatting
		dayNamesMin: ['Su','Mo','Tu','We','Th','Fr','Sa'], // Column headings for days starting at Sunday
		dayStatus: 'Set DD as first week day', // Status text for the day of the week selection
		dateStatus: 'Select DD, M d', // Status text for the date selection
		dateFormat: 'mm/dd/yy', // See format options on parseDate
		firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
		initStatus: 'Select a date', // Initial Status text on opening
		isRTL: false // True if right-to-left language, false if left-to-right
	};
	this._defaults = { // Global defaults for all the date picker instances
		showOn: 'focus', // 'focus' for popup on focus,
			// 'button' for trigger button, or 'both' for either
		showAnim: 'show', // Name of jQuery animation for popup
		showOptions: {}, // Options for enhanced animations
		defaultDate: null, // Used when field is blank: actual date,
			// +/-number for offset from today, null for today
		appendText: '', // Display text following the input box, e.g. showing the format
		buttonText: '...', // Text for trigger button
		buttonImage: '', // URL for trigger button image
		buttonImageOnly: false, // True if the image appears alone, false if it appears on a button
		closeAtTop: true, // True to have the clear/close at the top,
			// false to have them at the bottom
		mandatory: false, // True to hide the Clear link, false to include it
		hideIfNoPrevNext: false, // True to hide next/previous month links
			// if not applicable, false to just disable them
		navigationAsDateFormat: false, // True if date formatting applied to prev/today/next links
		showBigPrevNext: false, // True to show big prev/next links
		gotoCurrent: false, // True if today link goes back to current selection instead
		changeMonth: true, // True if month can be selected directly, false if only prev/next
		changeYear: true, // True if year can be selected directly, false if only prev/next
		showMonthAfterYear: false, // True if the year select precedes month, false for month then year
		yearRange: '-10:+10', // Range of years to display in drop-down,
			// either relative to current year (-nn:+nn) or absolute (nnnn:nnnn)
		changeFirstDay: true, // True to click on day name to change, false to remain as set
		highlightWeek: false, // True to highlight the selected week
		showOtherMonths: false, // True to show dates in other months, false to leave blank
		showWeeks: false, // True to show week of the year, false to omit
		calculateWeek: this.iso8601Week, // How to calculate the week of the year,
			// takes a Date and returns the number of the week for it
		shortYearCutoff: '+10', // Short year values < this are in the current century,
			// > this are in the previous century, 
			// string value starting with '+' for current year + value
		showStatus: false, // True to show status bar at bottom, false to not show it
		statusForDate: this.dateStatus, // Function to provide status text for a date -
			// takes date and instance as parameters, returns display text
		minDate: null, // The earliest selectable date, or null for no limit
		maxDate: null, // The latest selectable date, or null for no limit
		duration: 'normal', // Duration of display/closure
		beforeShowDay: null, // Function that takes a date and returns an array with
			// [0] = true if selectable, false if not, [1] = custom CSS class name(s) or '', 
			// [2] = cell title (optional), e.g. $.datepicker.noWeekends
		beforeShow: null, // Function that takes an input field and
			// returns a set of custom settings for the date picker
		onSelect: null, // Define a callback function when a date is selected
		onChangeMonthYear: null, // Define a callback function when the month or year is changed
		onClose: null, // Define a callback function when the datepicker is closed
		numberOfMonths: 1, // Number of months to show at a time
		showCurrentAtPos: 0, // The position in multipe months at which to show the current month (starting at 0)
		stepMonths: 1, // Number of months to step back/forward
		stepBigMonths: 12, // Number of months to step back/forward for the big links
		rangeSelect: false, // Allows for selecting a date range on one date picker
		rangeSeparator: ' - ', // Text between two dates in a range
		altField: '', // Selector for an alternate field to store selected dates into
		altFormat: '' // The date format to use for the alternate field
	};
	$.extend(this._defaults, this.regional['']);
	this.dpDiv = $('<div id="' + this._mainDivId + '" style="display: none;"></div>');
}

$.extend(Datepicker.prototype, {
	/* Class name added to elements to indicate already configured with a date picker. */
	markerClassName: 'hasDatepicker',

	/* Debug logging (if enabled). */
	log: function () {
		if (this.debug)
			console.log.apply('', arguments);
	},
	
	/* Override the default settings for all instances of the date picker. 
	   @param  settings  object - the new settings to use as defaults (anonymous object)
	   @return the manager object */
	setDefaults: function(settings) {
		extendRemove(this._defaults, settings || {});
		return this;
	},

	/* Attach the date picker to a jQuery selection.
	   @param  target    element - the target input field or division or span
	   @param  settings  object - the new settings to use for this date picker instance (anonymous) */
	_attachDatepicker: function(target, settings) {
		// check for settings on the control itself - in namespace 'date:'
		var inlineSettings = null;
		for (attrName in this._defaults) {
			var attrValue = target.getAttribute('date:' + attrName);
			if (attrValue) {
				inlineSettings = inlineSettings || {};
				try {
					inlineSettings[attrName] = eval(attrValue);
				} catch (err) {
					inlineSettings[attrName] = attrValue;
				}
			}
		}
		var nodeName = target.nodeName.toLowerCase();
		var inline = (nodeName == 'div' || nodeName == 'span');
		if (!target.id)
			target.id = 'dp' + (++this.uuid);
		var inst = this._newInst($(target), inline);
		inst.settings = $.extend({}, settings || {}, inlineSettings || {}); 
		if (nodeName == 'input') {
			this._connectDatepicker(target, inst);
		} else if (inline) {
			this._inlineDatepicker(target, inst);
		}
	},

	/* Create a new instance object. */
	_newInst: function(target, inline) {
		var id = target[0].id.replace(/([:\[\]\.])/g, '\\\\$1'); // escape jQuery meta chars
		return {id: id, input: target, // associated target
			selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
			drawMonth: 0, drawYear: 0, // month being drawn
			inline: inline, // is datepicker inline or not
			dpDiv: (!inline ? this.dpDiv : // presentation div
			$('<div class="' + this._inlineClass + '"></div>'))};
	},

	/* Attach the date picker to an input field. */
	_connectDatepicker: function(target, inst) {
		var input = $(target);
		if (input.hasClass(this.markerClassName))
			return;
		var appendText = this._get(inst, 'appendText');
		var isRTL = this._get(inst, 'isRTL');
		if (appendText)
			input[isRTL ? 'before' : 'after']('<span class="' + this._appendClass + '">' + appendText + '</span>');
		var showOn = this._get(inst, 'showOn');
		if (showOn == 'focus' || showOn == 'both') // pop-up date picker when in the marked field
			input.focus(this._showDatepicker);
		if (showOn == 'button' || showOn == 'both') { // pop-up date picker when button clicked
			var buttonText = this._get(inst, 'buttonText');
			var buttonImage = this._get(inst, 'buttonImage');
			var trigger = $(this._get(inst, 'buttonImageOnly') ? 
				$('<img/>').addClass(this._triggerClass).
					attr({ src: buttonImage, alt: buttonText, title: buttonText }) :
				$('<button type="button"></button>').addClass(this._triggerClass).
					html(buttonImage == '' ? buttonText : $('<img/>').attr(
					{ src:buttonImage, alt:buttonText, title:buttonText })));
			input[isRTL ? 'before' : 'after'](trigger);
			trigger.click(function() {
				if ($.datepicker._datepickerShowing && $.datepicker._lastInput == target)
					$.datepicker._hideDatepicker();
				else
					$.datepicker._showDatepicker(target);
				return false;
			});
		}
		input.addClass(this.markerClassName).keydown(this._doKeyDown).keypress(this._doKeyPress).
			bind("setData.datepicker", function(event, key, value) {
				inst.settings[key] = value;
			}).bind("getData.datepicker", function(event, key) {
				return this._get(inst, key);
			});
		$.data(target, PROP_NAME, inst);
	},

	/* Attach an inline date picker to a div. */
	_inlineDatepicker: function(target, inst) {
		var divSpan = $(target);
		if (divSpan.hasClass(this.markerClassName))
			return;
		divSpan.addClass(this.markerClassName).append(inst.dpDiv).
			bind("setData.datepicker", function(event, key, value){
				inst.settings[key] = value;
			}).bind("getData.datepicker", function(event, key){
				return this._get(inst, key);
			});
		$.data(target, PROP_NAME, inst);
		this._setDate(inst, this._getDefaultDate(inst));
		this._updateDatepicker(inst);
	},

	/* Tidy up after displaying the date picker. */
	_inlineShow: function(inst) {
		var numMonths = this._getNumberOfMonths(inst); // fix width for dynamic number of date pickers
		inst.dpDiv.width(numMonths[1] * $('.ui-datepicker', inst.dpDiv[0]).width());
	}, 

	/* Pop-up the date picker in a "dialog" box.
	   @param  input     element - ignored
	   @param  dateText  string - the initial date to display (in the current format)
	   @param  onSelect  function - the function(dateText) to call when a date is selected
	   @param  settings  object - update the dialog date picker instance's settings (anonymous object)
	   @param  pos       int[2] - coordinates for the dialog's position within the screen or
	                     event - with x/y coordinates or
	                     leave empty for default (screen centre)
	   @return the manager object */
	_dialogDatepicker: function(input, dateText, onSelect, settings, pos) {
		var inst = this._dialogInst; // internal instance
		if (!inst) {
			var id = 'dp' + (++this.uuid);
			this._dialogInput = $('<input type="text" id="' + id +
				'" size="1" style="position: absolute; top: -100px;"/>');
			this._dialogInput.keydown(this._doKeyDown);
			$('body').append(this._dialogInput);
			inst = this._dialogInst = this._newInst(this._dialogInput, false);
			inst.settings = {};
			$.data(this._dialogInput[0], PROP_NAME, inst);
		}
		extendRemove(inst.settings, settings || {});
		this._dialogInput.val(dateText);

		this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);
		if (!this._pos) {
			var browserWidth = window.innerWidth || document.documentElement.clientWidth ||	document.body.clientWidth;
			var browserHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
			var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
			var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
			this._pos = // should use actual width/height below
				[(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];
		}

		// move input on screen for focus, but hidden behind dialog
		this._dialogInput.css('left', this._pos[0] + 'px').css('top', this._pos[1] + 'px');
		inst.settings.onSelect = onSelect;
		this._inDialog = true;
		this.dpDiv.addClass(this._dialogClass);
		this._showDatepicker(this._dialogInput[0]);
		if ($.blockUI)
			$.blockUI(this.dpDiv);
		$.data(this._dialogInput[0], PROP_NAME, inst);
		return this;
	},

	/* Detach a datepicker from its control.
	   @param  target    element - the target input field or division or span */
	_destroyDatepicker: function(target) {
		var $target = $(target);
		if (!$target.hasClass(this.markerClassName)) {
			return;
		}
		var nodeName = target.nodeName.toLowerCase();
		$.removeData(target, PROP_NAME);
		if (nodeName == 'input') {
			$target.siblings('.' + this._appendClass).remove().end().
				siblings('.' + this._triggerClass).remove().end().
				removeClass(this.markerClassName).
				unbind('focus', this._showDatepicker).
				unbind('keydown', this._doKeyDown).
				unbind('keypress', this._doKeyPress);
		} else if (nodeName == 'div' || nodeName == 'span')
			$target.removeClass(this.markerClassName).empty();
	},

	/* Enable the date picker to a jQuery selection.
	   @param  target    element - the target input field or division or span */
	_enableDatepicker: function(target) {
		var $target = $(target);
		if (!$target.hasClass(this.markerClassName)) {
			return;
		}
		var nodeName = target.nodeName.toLowerCase();
		if (nodeName == 'input') {
		target.disabled = false;
			$target.siblings('button.' + this._triggerClass).
			each(function() { this.disabled = false; }).end().
				siblings('img.' + this._triggerClass).
				css({opacity: '1.0', cursor: ''});
		}
		else if (nodeName == 'div' || nodeName == 'span') {
			$target.children('.' + this._disableClass).remove();
		}
		this._disabledInputs = $.map(this._disabledInputs,
			function(value) { return (value == target ? null : value); }); // delete entry
	},

	/* Disable the date picker to a jQuery selection.
	   @param  target    element - the target input field or division or span */
	_disableDatepicker: function(target) {
		var $target = $(target);
		if (!$target.hasClass(this.markerClassName)) {
			return;
		}
		var nodeName = target.nodeName.toLowerCase();
		if (nodeName == 'input') {
		target.disabled = true;
			$target.siblings('button.' + this._triggerClass).
			each(function() { this.disabled = true; }).end().
				siblings('img.' + this._triggerClass).
				css({opacity: '0.5', cursor: 'default'});
		}
		else if (nodeName == 'div' || nodeName == 'span') {
			var inline = $target.children('.' + this._inlineClass);
			var offset = inline.offset();
			var relOffset = {left: 0, top: 0};
			inline.parents().each(function() {
				if ($(this).css('position') == 'relative') {
					relOffset = $(this).offset();
					return false;
				}
			});
			$target.prepend('<div class="' + this._disableClass + '" style="' +
				($.browser.msie ? 'background-color: transparent; ' : '') +
				'width: ' + inline.width() + 'px; height: ' + inline.height() +
				'px; left: ' + (offset.left - relOffset.left) +
				'px; top: ' + (offset.top - relOffset.top) + 'px;"></div>');
		}
		this._disabledInputs = $.map(this._disabledInputs,
			function(value) { return (value == target ? null : value); }); // delete entry
		this._disabledInputs[this._disabledInputs.length] = target;
	},

	/* Is the first field in a jQuery collection disabled as a datepicker?
	   @param  target    element - the target input field or division or span
	   @return boolean - true if disabled, false if enabled */
	_isDisabledDatepicker: function(target) {
		if (!target)
			return false;
		for (var i = 0; i < this._disabledInputs.length; i++) {
			if (this._disabledInputs[i] == target)
				return true;
		}
		return false;
	},

	/* Retrieve the instance data for the target control.
	   @param  target  element - the target input field or division or span
	   @return  object - the associated instance data
	   @throws  error if a jQuery problem getting data */
	_getInst: function(target) {
		try {
			return $.data(target, PROP_NAME);
		}
		catch (err) {
			throw 'Missing instance data for this datepicker';
		}
	},

	/* Update the settings for a date picker attached to an input field or division.
	   @param  target  element - the target input field or division or span
	   @param  name    object - the new settings to update or
	                   string - the name of the setting to change or
	   @param  value   any - the new value for the setting (omit if above is an object) */
	_changeDatepicker: function(target, name, value) {
		var settings = name || {};
		if (typeof name == 'string') {
			settings = {};
			settings[name] = value;
		}
		var inst = this._getInst(target);
		if (inst) {
			if (this._curInst == inst) {
				this._hideDatepicker(null);
			}
			extendRemove(inst.settings, settings);
			var date = new Date();
			extendRemove(inst, {rangeStart: null, // start of range
				endDay: null, endMonth: null, endYear: null, // end of range
				selectedDay: date.getDate(), selectedMonth: date.getMonth(),
				selectedYear: date.getFullYear(), // starting point
				currentDay: date.getDate(), currentMonth: date.getMonth(),
				currentYear: date.getFullYear(), // current selection
				drawMonth: date.getMonth(), drawYear: date.getFullYear()}); // month being drawn
			this._updateDatepicker(inst);
		}
	},

	/* Redraw the date picker attached to an input field or division.
	   @param  target  element - the target input field or division or span */
	_refreshDatepicker: function(target) {
		var inst = this._getInst(target);
		if (inst) {
			this._updateDatepicker(inst);
		}
	},

	/* Set the dates for a jQuery selection.
	   @param  target   element - the target input field or division or span
	   @param  date     Date - the new date
	   @param  endDate  Date - the new end date for a range (optional) */
	_setDateDatepicker: function(target, date, endDate) {
		var inst = this._getInst(target);
		if (inst) {
			this._setDate(inst, date, endDate);
			this._updateDatepicker(inst);
			this._updateAlternate(inst);
		}
	},

	/* Get the date(s) for the first entry in a jQuery selection.
	   @param  target  element - the target input field or division or span
	   @return Date - the current date or
	           Date[2] - the current dates for a range */
	_getDateDatepicker: function(target) {
		var inst = this._getInst(target);
		if (inst && !inst.inline)
			this._setDateFromField(inst); 
		return (inst ? this._getDate(inst) : null);
	},

	/* Handle keystrokes. */
	_doKeyDown: function(e) {
		var inst = $.datepicker._getInst(e.target);
		var handled = true;
		if ($.datepicker._datepickerShowing)
			switch (e.keyCode) {
				case 9:  $.datepicker._hideDatepicker(null, '');
						break; // hide on tab out
				case 13: $.datepicker._selectDay(e.target, inst.selectedMonth, inst.selectedYear,
							$('td.ui-datepicker-days-cell-over', inst.dpDiv)[0]);
						return false; // don't submit the form
						break; // select the value on enter
				case 27: $.datepicker._hideDatepicker(null, $.datepicker._get(inst, 'duration'));
						break; // hide on escape
				case 33: $.datepicker._adjustDate(e.target, (e.ctrlKey ?
							-$.datepicker._get(inst, 'stepBigMonths') :
							-$.datepicker._get(inst, 'stepMonths')), 'M');
						break; // previous month/year on page up/+ ctrl
				case 34: $.datepicker._adjustDate(e.target, (e.ctrlKey ?
							+$.datepicker._get(inst, 'stepBigMonths') :
							+$.datepicker._get(inst, 'stepMonths')), 'M');
						break; // next month/year on page down/+ ctrl
				case 35: if (e.ctrlKey) $.datepicker._clearDate(e.target);
						handled = e.ctrlKey;
						break; // clear on ctrl+end
				case 36: if (e.ctrlKey) $.datepicker._gotoToday(e.target);
						handled = e.ctrlKey;
						break; // current on ctrl+home
				case 37: if (e.ctrlKey) $.datepicker._adjustDate(e.target, -1, 'D');
						handled = e.ctrlKey;
						break; // -1 day on ctrl+left
				case 38: if (e.ctrlKey) $.datepicker._adjustDate(e.target, -7, 'D');
						handled = e.ctrlKey;
						break; // -1 week on ctrl+up
				case 39: if (e.ctrlKey) $.datepicker._adjustDate(e.target, +1, 'D');
						handled = e.ctrlKey;
						break; // +1 day on ctrl+right
				case 40: if (e.ctrlKey) $.datepicker._adjustDate(e.target, +7, 'D');
						handled = e.ctrlKey;
						break; // +1 week on ctrl+down
				default: handled = false;
			}
		else if (e.keyCode == 36 && e.ctrlKey) // display the date picker on ctrl+home
			$.datepicker._showDatepicker(this);
		else
			handled = false;
		if (handled) {
			e.preventDefault();
			e.stopPropagation();
		}
	},

	/* Filter entered characters - based on date format. */
	_doKeyPress: function(e) {
		var inst = $.datepicker._getInst(e.target);
		var chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
		var chr = String.fromCharCode(e.charCode == undefined ? e.keyCode : e.charCode);
		return e.ctrlKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);
	},

	/* Pop-up the date picker for a given input field.
	   @param  input  element - the input field attached to the date picker or
	                  event - if triggered by focus */
	_showDatepicker: function(input) {
		input = input.target || input;
		if (input.nodeName.toLowerCase() != 'input') // find from button/image trigger
			input = $('input', input.parentNode)[0];
		if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput == input) // already here
			return;
		var inst = $.datepicker._getInst(input);
		var beforeShow = $.datepicker._get(inst, 'beforeShow');
		extendRemove(inst.settings, (beforeShow ? beforeShow.apply(input, [input, inst]) : {}));
		$.datepicker._hideDatepicker(null, '');
		$.datepicker._lastInput = input;
		$.datepicker._setDateFromField(inst);
		if ($.datepicker._inDialog) // hide cursor
			input.value = '';
		if (!$.datepicker._pos) { // position below input
			$.datepicker._pos = $.datepicker._findPos(input);
			$.datepicker._pos[1] += input.offsetHeight; // add the height
		}
		var isFixed = false;
		$(input).parents().each(function() {
			isFixed |= $(this).css('position') == 'fixed';
			return !isFixed;
		});
		if (isFixed && $.browser.opera) { // correction for Opera when fixed and scrolled
			$.datepicker._pos[0] -= document.documentElement.scrollLeft;
			$.datepicker._pos[1] -= document.documentElement.scrollTop;
		}
		var offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
		$.datepicker._pos = null;
		inst.rangeStart = null;
		// determine sizing offscreen
		inst.dpDiv.css({position: 'absolute', display: 'block', top: '-1000px'});
		$.datepicker._updateDatepicker(inst);
		// fix width for dynamic number of date pickers
		inst.dpDiv.width($.datepicker._getNumberOfMonths(inst)[1] *
			$('.ui-datepicker', inst.dpDiv[0])[0].offsetWidth);
		// and adjust position before showing
		offset = $.datepicker._checkOffset(inst, offset, isFixed);
		inst.dpDiv.css({position: ($.datepicker._inDialog && $.blockUI ?
			'static' : (isFixed ? 'fixed' : 'absolute')), display: 'none',
			left: offset.left + 'px', top: offset.top + 'px'});
		if (!inst.inline) {
			var showAnim = $.datepicker._get(inst, 'showAnim') || 'show';
			var duration = $.datepicker._get(inst, 'duration');
			var postProcess = function() {
				$.datepicker._datepickerShowing = true;
				if ($.browser.msie && parseInt($.browser.version,10) < 7) // fix IE < 7 select problems
					$('iframe.ui-datepicker-cover').css({width: inst.dpDiv.width() + 4,
						height: inst.dpDiv.height() + 4});
			};
			if ($.effects && $.effects[showAnim])
				inst.dpDiv.show(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);
			else
				inst.dpDiv[showAnim](duration, postProcess);
			if (duration == '')
				postProcess();
			if (inst.input[0].type != 'hidden')
				inst.input[0].focus();
			$.datepicker._curInst = inst;
		}
	},

	/* Generate the date picker content. */
	_updateDatepicker: function(inst) {
		var dims = {width: inst.dpDiv.width() + 4,
			height: inst.dpDiv.height() + 4};
		inst.dpDiv.empty().append(this._generateHTML(inst)).
			find('iframe.ui-datepicker-cover').
			css({width: dims.width, height: dims.height});
		var numMonths = this._getNumberOfMonths(inst);
		inst.dpDiv[(numMonths[0] != 1 || numMonths[1] != 1 ? 'add' : 'remove') +
			'Class']('ui-datepicker-multi');
		inst.dpDiv[(this._get(inst, 'isRTL') ? 'add' : 'remove') +
			'Class']('ui-datepicker-rtl');
		if (inst.input && inst.input[0].type != 'hidden')
			$(inst.input[0]).focus();
	},

	/* Check positioning to remain on screen. */
	_checkOffset: function(inst, offset, isFixed) {
		var pos = inst.input ? this._findPos(inst.input[0]) : null;
		var browserWidth = window.innerWidth || document.documentElement.clientWidth;
		var browserHeight = window.innerHeight || document.documentElement.clientHeight;
		var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
		var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
		// reposition date picker horizontally if outside the browser window
		if (this._get(inst, 'isRTL') || (offset.left + inst.dpDiv.width() - scrollX) > browserWidth)
			offset.left = Math.max((isFixed ? 0 : scrollX),
				pos[0] + (inst.input ? inst.input.width() : 0) - (isFixed ? scrollX : 0) - inst.dpDiv.width() -
				(isFixed && $.browser.opera ? document.documentElement.scrollLeft : 0));
		else
			offset.left -= (isFixed ? scrollX : 0);
		// reposition date picker vertically if outside the browser window
		if ((offset.top + inst.dpDiv.height() - scrollY) > browserHeight)
			offset.top = Math.max((isFixed ? 0 : scrollY),
				pos[1] - (isFixed ? scrollY : 0) - (this._inDialog ? 0 : inst.dpDiv.height()) -
				(isFixed && $.browser.opera ? document.documentElement.scrollTop : 0));
		else
			offset.top -= (isFixed ? scrollY : 0);
		return offset;
	},
	
	/* Find an object's position on the screen. */
	_findPos: function(obj) {
        while (obj && (obj.type == 'hidden' || obj.nodeType != 1)) {
            obj = obj.nextSibling;
        }
        var position = $(obj).offset();
	    return [position.left, position.top];
	},

	/* Hide the date picker from view.
	   @param  input  element - the input field attached to the date picker
	   @param  duration  string - the duration over which to close the date picker */
	_hideDatepicker: function(input, duration) {
		var inst = this._curInst;
		if (!inst || (input && inst != $.data(input, PROP_NAME)))
			return;
		var rangeSelect = this._get(inst, 'rangeSelect');
		if (rangeSelect && inst.stayOpen)
			this._selectDate('#' + inst.id, this._formatDate(inst,
				inst.currentDay, inst.currentMonth, inst.currentYear));
		inst.stayOpen = false;
		if (this._datepickerShowing) {
			duration = (duration != null ? duration : this._get(inst, 'duration'));
			var showAnim = this._get(inst, 'showAnim');
			var postProcess = function() {
				$.datepicker._tidyDialog(inst);
			};
			if (duration != '' && $.effects && $.effects[showAnim])
				inst.dpDiv.hide(showAnim, $.datepicker._get(inst, 'showOptions'),
					duration, postProcess);
			else
				inst.dpDiv[(duration == '' ? 'hide' : (showAnim == 'slideDown' ? 'slideUp' :
					(showAnim == 'fadeIn' ? 'fadeOut' : 'hide')))](duration, postProcess);
			if (duration == '')
				this._tidyDialog(inst);
			var onClose = this._get(inst, 'onClose');
			if (onClose)
				onClose.apply((inst.input ? inst.input[0] : null),
					[(inst.input ? inst.input.val() : ''), inst]);  // trigger custom callback
			this._datepickerShowing = false;
			this._lastInput = null;
			inst.settings.prompt = null;
			if (this._inDialog) {
				this._dialogInput.css({ position: 'absolute', left: '0', top: '-100px' });
				if ($.blockUI) {
					$.unblockUI();
					$('body').append(this.dpDiv);
				}
			}
			this._inDialog = false;
		}
		this._curInst = null;
	},

	/* Tidy up after a dialog display. */
	_tidyDialog: function(inst) {
		inst.dpDiv.removeClass(this._dialogClass).unbind('.ui-datepicker');
		$('.' + this._promptClass, inst.dpDiv).remove();
	},

	/* Close date picker if clicked elsewhere. */
	_checkExternalClick: function(event) {
		if (!$.datepicker._curInst)
			return;
		var $target = $(event.target);
		if (($target.parents('#' + $.datepicker._mainDivId).length == 0) &&
				!$target.hasClass($.datepicker.markerClassName) &&
				!$target.hasClass($.datepicker._triggerClass) &&
				$.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI))
			$.datepicker._hideDatepicker(null, '');
	},

	/* Adjust one of the date sub-fields. */
	_adjustDate: function(id, offset, period) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		this._adjustInstDate(inst, offset, period);
		this._updateDatepicker(inst);
	},

	/* Action for current link. */
	_gotoToday: function(id) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		if (this._get(inst, 'gotoCurrent') && inst.currentDay) {
			inst.selectedDay = inst.currentDay;
			inst.drawMonth = inst.selectedMonth = inst.currentMonth;
			inst.drawYear = inst.selectedYear = inst.currentYear;
		}
		else {
		var date = new Date();
		inst.selectedDay = date.getDate();
		inst.drawMonth = inst.selectedMonth = date.getMonth();
		inst.drawYear = inst.selectedYear = date.getFullYear();
		}
		this._notifyChange(inst);
		this._adjustDate(target);
	},

	/* Action for selecting a new month/year. */
	_selectMonthYear: function(id, select, period) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		inst._selectingMonthYear = false;
		inst['selected' + (period == 'M' ? 'Month' : 'Year')] =
		inst['draw' + (period == 'M' ? 'Month' : 'Year')] =
			parseInt(select.options[select.selectedIndex].value,10);
		this._notifyChange(inst);
		this._adjustDate(target);
	},

	/* Restore input focus after not changing month/year. */
	_clickMonthYear: function(id) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		if (inst.input && inst._selectingMonthYear && !$.browser.msie)
			inst.input[0].focus();
		inst._selectingMonthYear = !inst._selectingMonthYear;
	},

	/* Action for changing the first week day. */
	_changeFirstDay: function(id, day) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		inst.settings.firstDay = day;
		this._updateDatepicker(inst);
	},

	/* Action for selecting a day. */
	_selectDay: function(id, month, year, td) {
		if ($(td).hasClass(this._unselectableClass))
			return;
		var target = $(id);
		var inst = this._getInst(target[0]);
		var rangeSelect = this._get(inst, 'rangeSelect');
		if (rangeSelect) {
			inst.stayOpen = !inst.stayOpen;
			if (inst.stayOpen) {
				$('.ui-datepicker td', inst.dpDiv).removeClass(this._currentClass);
				$(td).addClass(this._currentClass);
			} 
		}
		inst.selectedDay = inst.currentDay = $('a', td).html();
		inst.selectedMonth = inst.currentMonth = month;
		inst.selectedYear = inst.currentYear = year;
		if (inst.stayOpen) {
			inst.endDay = inst.endMonth = inst.endYear = null;
		}
		else if (rangeSelect) {
			inst.endDay = inst.currentDay;
			inst.endMonth = inst.currentMonth;
			inst.endYear = inst.currentYear;
		}
		this._selectDate(id, this._formatDate(inst,
			inst.currentDay, inst.currentMonth, inst.currentYear));
		if (inst.stayOpen) {
			inst.rangeStart = new Date(inst.currentYear, inst.currentMonth, inst.currentDay);
			this._updateDatepicker(inst);
		}
		else if (rangeSelect) {
			inst.selectedDay = inst.currentDay = inst.rangeStart.getDate();
			inst.selectedMonth = inst.currentMonth = inst.rangeStart.getMonth();
			inst.selectedYear = inst.currentYear = inst.rangeStart.getFullYear();
			inst.rangeStart = null;
			if (inst.inline)
				this._updateDatepicker(inst);
		}
	},

	/* Erase the input field and hide the date picker. */
	_clearDate: function(id) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		if (this._get(inst, 'mandatory'))
			return;
		inst.stayOpen = false;
		inst.endDay = inst.endMonth = inst.endYear = inst.rangeStart = null;
		this._selectDate(target, '');
	},

	/* Update the input field with the selected date. */
	_selectDate: function(id, dateStr) {
		var target = $(id);
		var inst = this._getInst(target[0]);
		dateStr = (dateStr != null ? dateStr : this._formatDate(inst));
		if (this._get(inst, 'rangeSelect') && dateStr)
			dateStr = (inst.rangeStart ? this._formatDate(inst, inst.rangeStart) :
				dateStr) + this._get(inst, 'rangeSeparator') + dateStr;
		if (inst.input)
			inst.input.val(dateStr);
		this._updateAlternate(inst);
		var onSelect = this._get(inst, 'onSelect');
		if (onSelect)
			onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
		else if (inst.input)
			inst.input.trigger('change'); // fire the change event
		if (inst.inline)
			this._updateDatepicker(inst);
		else if (!inst.stayOpen) {
			this._hideDatepicker(null, this._get(inst, 'duration'));
			this._lastInput = inst.input[0];
			if (typeof(inst.input[0]) != 'object')
				inst.input[0].focus(); // restore focus
			this._lastInput = null;
		}
	},
	
	/* Update any alternate field to synchronise with the main field. */
	_updateAlternate: function(inst) {
		var altField = this._get(inst, 'altField');
		if (altField) { // update alternate field too
			var altFormat = this._get(inst, 'altFormat');
			var date = this._getDate(inst);
			dateStr = (isArray(date) ? (!date[0] && !date[1] ? '' :
				this.formatDate(altFormat, date[0], this._getFormatConfig(inst)) +
				this._get(inst, 'rangeSeparator') + this.formatDate(
				altFormat, date[1] || date[0], this._getFormatConfig(inst))) :
				this.formatDate(altFormat, date, this._getFormatConfig(inst)));
			$(altField).each(function() { $(this).val(dateStr); });
		}
	},

	/* Set as beforeShowDay function to prevent selection of weekends.
	   @param  date  Date - the date to customise
	   @return [boolean, string] - is this date selectable?, what is its CSS class? */
	noWeekends: function(date) {
		var day = date.getDay();
		return [(day > 0 && day < 6), ''];
	},
	
	/* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
	   @param  date  Date - the date to get the week for
	   @return  number - the number of the week within the year that contains this date */
	iso8601Week: function(date) {
		var checkDate = new Date(date.getFullYear(), date.getMonth(), date.getDate(),
			(date.getTimezoneOffset() / -60));
		var firstMon = new Date(checkDate.getFullYear(), 1 - 1, 4); // First week always contains 4 Jan
		var firstDay = firstMon.getDay() || 7; // Day of week: Mon = 1, ..., Sun = 7
		firstMon.setDate(firstMon.getDate() + 1 - firstDay); // Preceding Monday
		if (firstDay < 4 && checkDate < firstMon) { // Adjust first three days in year if necessary
			checkDate.setDate(checkDate.getDate() - 3); // Generate for previous year
			return $.datepicker.iso8601Week(checkDate);
		} else if (checkDate > new Date(checkDate.getFullYear(), 12 - 1, 28)) { // Check last three days in year
			firstDay = new Date(checkDate.getFullYear() + 1, 1 - 1, 4).getDay() || 7;
			if (firstDay > 4 && (checkDate.getDay() || 7) < firstDay - 3) { // Adjust if necessary
				return 1;
			}
		}
		return Math.floor(((checkDate - firstMon) / 86400000) / 7) + 1; // Weeks to given date
	},
	
	/* Provide status text for a particular date.
	   @param  date  the date to get the status for
	   @param  inst  the current datepicker instance
	   @return  the status display text for this date */
	dateStatus: function(date, inst) {
		return $.datepicker.formatDate($.datepicker._get(inst, 'dateStatus'),
			date, $.datepicker._getFormatConfig(inst));
	},

	/* Parse a string value into a date object.
	   See formatDate below for the possible formats.

	   @param  format    string - the expected format of the date
	   @param  value     string - the date in the above format
	   @param  settings  Object - attributes include:
	                     shortYearCutoff  number - the cutoff year for determining the century (optional)
	                     dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
	                     dayNames         string[7] - names of the days from Sunday (optional)
	                     monthNamesShort  string[12] - abbreviated names of the months (optional)
	                     monthNames       string[12] - names of the months (optional)
	   @return  Date - the extracted date value or null if value is blank */
	parseDate: function (format, value, settings) {
		if (format == null || value == null)
			throw 'Invalid arguments';
		value = (typeof value == 'object' ? value.toString() : value + '');
		if (value == '')
			return null;
		var shortYearCutoff = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff;
		var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
		var year = -1;
		var month = -1;
		var day = -1;
		var doy = -1;
		var literal = false;
		// Check whether a format character is doubled
		var lookAhead = function(match) {
			var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
			if (matches)
				iFormat++;
			return matches;	
		};
		// Extract a number from the string value
		var getNumber = function(match) {
			lookAhead(match);
			var origSize = (match == '@' ? 14 : (match == 'y' ? 4 : (match == 'o' ? 3 : 2)));
			var size = origSize;
			var num = 0;
			while (size > 0 && iValue < value.length &&
					value.charAt(iValue) >= '0' && value.charAt(iValue) <= '9') {
				num = num * 10 + parseInt(value.charAt(iValue++),10);
				size--;
			}
			if (size == origSize)
				throw 'Missing number at position ' + iValue;
			return num;
		};
		// Extract a name from the string value and convert to an index
		var getName = function(match, shortNames, longNames) {
			var names = (lookAhead(match) ? longNames : shortNames);
			var size = 0;
			for (var j = 0; j < names.length; j++)
				size = Math.max(size, names[j].length);
			var name = '';
			var iInit = iValue;
			while (size > 0 && iValue < value.length) {
				name += value.charAt(iValue++);
				for (var i = 0; i < names.length; i++)
					if (name == names[i])
						return i + 1;
				size--;
			}
			throw 'Unknown name at position ' + iInit;
		};
		// Confirm that a literal character matches the string value
		var checkLiteral = function() {
			if (value.charAt(iValue) != format.charAt(iFormat))
				throw 'Unexpected literal at position ' + iValue;
			iValue++;
		};
		var iValue = 0;
		for (var iFormat = 0; iFormat < format.length; iFormat++) {
			if (literal)
				if (format.charAt(iFormat) == "'" && !lookAhead("'"))
					literal = false;
				else
					checkLiteral();
			else
				switch (format.charAt(iFormat)) {
					case 'd':
						day = getNumber('d');
						break;
					case 'D': 
						getName('D', dayNamesShort, dayNames);
						break;
					case 'o':
						doy = getNumber('o');
						break;
					case 'm': 
						month = getNumber('m');
						break;
					case 'M':
						month = getName('M', monthNamesShort, monthNames); 
						break;
					case 'y':
						year = getNumber('y');
						break;
					case '@':
						var date = new Date(getNumber('@'));
						year = date.getFullYear();
						month = date.getMonth() + 1;
						day = date.getDate();
						break;
					case "'":
						if (lookAhead("'"))
							checkLiteral();
						else
							literal = true;
						break;
					default:
						checkLiteral();
				}
		}
		if (year < 100)
			year += new Date().getFullYear() - new Date().getFullYear() % 100 +
				(year <= shortYearCutoff ? 0 : -100);
		if (doy > -1) {
			month = 1;
			day = doy;
			do {
				var dim = this._getDaysInMonth(year, month - 1);
				if (day <= dim)
					break;
				month++;
				day -= dim;
			} while (true);
		}
		var date = new Date(year, month - 1, day);
		if (date.getFullYear() != year || date.getMonth() + 1 != month || date.getDate() != day)
			throw 'Invalid date'; // E.g. 31/02/*
		return date;
	},

	/* Standard date formats. */
	ATOM: 'yy-mm-dd', // RFC 3339 (ISO 8601)
	COOKIE: 'D, dd M yy',
	ISO_8601: 'yy-mm-dd',
	RFC_822: 'D, d M y',
	RFC_850: 'DD, dd-M-y',
	RFC_1036: 'D, d M y',
	RFC_1123: 'D, d M yy',
	RFC_2822: 'D, d M yy',
	RSS: 'D, d M y', // RFC 822
	TIMESTAMP: '@',
	W3C: 'yy-mm-dd', // ISO 8601

	/* Format a date object into a string value.
	   The format can be combinations of the following:
	   d  - day of month (no leading zero)
	   dd - day of month (two digit)
	   o  - day of year (no leading zeros)
	   oo - day of year (three digit)
	   D  - day name short
	   DD - day name long
	   m  - month of year (no leading zero)
	   mm - month of year (two digit)
	   M  - month name short
	   MM - month name long
	   y  - year (two digit)
	   yy - year (four digit)
	   @ - Unix timestamp (ms since 01/01/1970)
	   '...' - literal text
	   '' - single quote

	   @param  format    string - the desired format of the date
	   @param  date      Date - the date value to format
	   @param  settings  Object - attributes include:
	                     dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
	                     dayNames         string[7] - names of the days from Sunday (optional)
	                     monthNamesShort  string[12] - abbreviated names of the months (optional)
	                     monthNames       string[12] - names of the months (optional)
	   @return  string - the date in the above format */
	formatDate: function (format, date, settings) {
		if (!date)
			return '';
		var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
		// Check whether a format character is doubled
		var lookAhead = function(match) {
			var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
			if (matches)
				iFormat++;
			return matches;	
		};
		// Format a number, with leading zero if necessary
		var formatNumber = function(match, value, len) {
			var num = '' + value;
			if (lookAhead(match))
				while (num.length < len)
					num = '0' + num;
			return num;
		};
		// Format a name, short or long as requested
		var formatName = function(match, value, shortNames, longNames) {
			return (lookAhead(match) ? longNames[value] : shortNames[value]);
		};
		var output = '';
		var literal = false;
		if (date)
			for (var iFormat = 0; iFormat < format.length; iFormat++) {
				if (literal)
					if (format.charAt(iFormat) == "'" && !lookAhead("'"))
						literal = false;
					else
						output += format.charAt(iFormat);
				else
					switch (format.charAt(iFormat)) {
						case 'd':
							output += formatNumber('d', date.getDate(), 2);
							break;
						case 'D': 
							output += formatName('D', date.getDay(), dayNamesShort, dayNames);
							break;
						case 'o':
							var doy = date.getDate();
							for (var m = date.getMonth() - 1; m >= 0; m--)
								doy += this._getDaysInMonth(date.getFullYear(), m);
							output += formatNumber('o', doy, 3);
							break;
						case 'm': 
							output += formatNumber('m', date.getMonth() + 1, 2);
							break;
						case 'M':
							output += formatName('M', date.getMonth(), monthNamesShort, monthNames); 
							break;
						case 'y':
							output += (lookAhead('y') ? date.getFullYear() : 
								(date.getYear() % 100 < 10 ? '0' : '') + date.getYear() % 100);
							break;
						case '@':
							output += date.getTime(); 
							break;
						case "'":
							if (lookAhead("'"))
								output += "'";
							else
								literal = true;
							break;
						default:
							output += format.charAt(iFormat);
					}
			}
		return output;
	},

	/* Extract all possible characters from the date format. */
	_possibleChars: function (format) {
		var chars = '';
		var literal = false;
		for (var iFormat = 0; iFormat < format.length; iFormat++)
			if (literal)
				if (format.charAt(iFormat) == "'" && !lookAhead("'"))
					literal = false;
				else
					chars += format.charAt(iFormat);
			else
				switch (format.charAt(iFormat)) {
					case 'd': case 'm': case 'y': case '@':
						chars += '0123456789'; 
						break;
					case 'D': case 'M':
						return null; // Accept anything
					case "'":
						if (lookAhead("'"))
							chars += "'";
						else
							literal = true;
						break;
					default:
						chars += format.charAt(iFormat);
				}
		return chars;
	},

	/* Get a setting value, defaulting if necessary. */
	_get: function(inst, name) {
		return inst.settings[name] !== undefined ?
			inst.settings[name] : this._defaults[name];
	},

	/* Parse existing date and initialise date picker. */
	_setDateFromField: function(inst) {
		var dateFormat = this._get(inst, 'dateFormat');
		var dates = inst.input ? inst.input.val().split(this._get(inst, 'rangeSeparator')) : null; 
		inst.endDay = inst.endMonth = inst.endYear = null;
		var date = defaultDate = this._getDefaultDate(inst);
		if (dates.length > 0) {
			var settings = this._getFormatConfig(inst);
			if (dates.length > 1) {
				date = this.parseDate(dateFormat, dates[1], settings) || defaultDate;
				inst.endDay = date.getDate();
				inst.endMonth = date.getMonth();
				inst.endYear = date.getFullYear();
			}
			try {
				date = this.parseDate(dateFormat, dates[0], settings) || defaultDate;
			} catch (e) {
				this.log(e);
				date = defaultDate;
			}
		}
		inst.selectedDay = date.getDate();
		inst.drawMonth = inst.selectedMonth = date.getMonth();
		inst.drawYear = inst.selectedYear = date.getFullYear();
		inst.currentDay = (dates[0] ? date.getDate() : 0);
		inst.currentMonth = (dates[0] ? date.getMonth() : 0);
		inst.currentYear = (dates[0] ? date.getFullYear() : 0);
		this._adjustInstDate(inst);
	},
	
	/* Retrieve the default date shown on opening. */
	_getDefaultDate: function(inst) {
		var date = this._determineDate(this._get(inst, 'defaultDate'), new Date());
		var minDate = this._getMinMaxDate(inst, 'min', true);
		var maxDate = this._getMinMaxDate(inst, 'max');
		date = (minDate && date < minDate ? minDate : date);
		date = (maxDate && date > maxDate ? maxDate : date);
		return date;
	},

	/* A date may be specified as an exact value or a relative one. */
	_determineDate: function(date, defaultDate) {
		var offsetNumeric = function(offset) {
			var date = new Date();
			date.setUTCDate(date.getUTCDate() + offset);
			return date;
		};
		var offsetString = function(offset, getDaysInMonth) {
			var date = new Date();
			var year = date.getFullYear();
			var month = date.getMonth();
			var day = date.getDate();
			var pattern = /([+-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g;
			var matches = pattern.exec(offset);
			while (matches) {
				switch (matches[2] || 'd') {
					case 'd' : case 'D' :
						day += parseInt(matches[1],10); break;
					case 'w' : case 'W' :
						day += parseInt(matches[1],10) * 7; break;
					case 'm' : case 'M' :
						month += parseInt(matches[1],10); 
						day = Math.min(day, getDaysInMonth(year, month));
						break;
					case 'y': case 'Y' :
						year += parseInt(matches[1],10);
						day = Math.min(day, getDaysInMonth(year, month));
						break;
				}
				matches = pattern.exec(offset);
			}
			return new Date(year, month, day);
		};
		date = (date == null ? defaultDate :
			(typeof date == 'string' ? offsetString(date, this._getDaysInMonth) :
			(typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : date)));
		return (date && date.toString() == 'Invalid Date' ? defaultDate : date);
	},

	/* Set the date(s) directly. */
	_setDate: function(inst, date, endDate) {
		var clear = !(date);
		var origMonth = inst.selectedMonth;
		var origYear = inst.selectedYear;
		date = this._determineDate(date, new Date());
		inst.selectedDay = inst.currentDay = date.getDate();
		inst.drawMonth = inst.selectedMonth = inst.currentMonth = date.getMonth();
		inst.drawYear = inst.selectedYear = inst.currentYear = date.getFullYear();
		if (this._get(inst, 'rangeSelect')) {
			if (endDate) {
				endDate = this._determineDate(endDate, null);
				inst.endDay = endDate.getDate();
				inst.endMonth = endDate.getMonth();
				inst.endYear = endDate.getFullYear();
			} else {
				inst.endDay = inst.currentDay;
				inst.endMonth = inst.currentMonth;
				inst.endYear = inst.currentYear;
			}
		}
		if (origMonth != inst.selectedMonth || origYear != inst.selectedYear)
			this._notifyChange(inst);
		this._adjustInstDate(inst);
		if (inst.input)
			inst.input.val(clear ? '' : this._formatDate(inst) +
				(!this._get(inst, 'rangeSelect') ? '' : this._get(inst, 'rangeSeparator') +
				this._formatDate(inst, inst.endDay, inst.endMonth, inst.endYear)));
	},

	/* Retrieve the date(s) directly. */
	_getDate: function(inst) {
		var startDate = (!inst.currentYear || (inst.input && inst.input.val() == '') ? null :
			new Date(inst.currentYear, inst.currentMonth, inst.currentDay));
		if (this._get(inst, 'rangeSelect')) {
			return [inst.rangeStart || startDate,
				(!inst.endYear ? inst.rangeStart || startDate :
				new Date(inst.endYear, inst.endMonth, inst.endDay))];
		} else
			return startDate;
	},

	/* Generate the HTML for the current state of the date picker. */
	_generateHTML: function(inst) {
		var today = new Date();
		today = new Date(today.getFullYear(), today.getMonth(), today.getDate()); // clear time
		var showStatus = this._get(inst, 'showStatus');
		var initStatus = this._get(inst, 'initStatus') || '&#xa0;';
		var isRTL = this._get(inst, 'isRTL');
		// build the date picker HTML
		var clear = (this._get(inst, 'mandatory') ? '' :
			'<div class="ui-datepicker-clear"><a onclick="jQuery.datepicker._clearDate(\'#' + inst.id + '\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'clearStatus'), initStatus) + '>' +
			this._get(inst, 'clearText') + '</a></div>');
		var controls = '<div class="ui-datepicker-control">' + (isRTL ? '' : clear) +
			'<div class="ui-datepicker-close"><a onclick="jQuery.datepicker._hideDatepicker();"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'closeStatus'), initStatus) + '>' +
			this._get(inst, 'closeText') + '</a></div>' + (isRTL ? clear : '')  + '</div>';
		var prompt = this._get(inst, 'prompt');
		var closeAtTop = this._get(inst, 'closeAtTop');
		var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');
		var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');
		var showBigPrevNext = this._get(inst, 'showBigPrevNext');
		var numMonths = this._getNumberOfMonths(inst);
		var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');
		var stepMonths = this._get(inst, 'stepMonths');
		var stepBigMonths = this._get(inst, 'stepBigMonths');
		var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);
		var currentDate = (!inst.currentDay ? new Date(9999, 9, 9) :
			new Date(inst.currentYear, inst.currentMonth, inst.currentDay));
		var minDate = this._getMinMaxDate(inst, 'min', true);
		var maxDate = this._getMinMaxDate(inst, 'max');
		var drawMonth = inst.drawMonth - showCurrentAtPos;
		var drawYear = inst.drawYear;
		if (drawMonth < 0) {
			drawMonth += 12;
			drawYear--;
		}
		if (maxDate) {
			var maxDraw = new Date(maxDate.getFullYear(),
				maxDate.getMonth() - numMonths[1] + 1, maxDate.getDate());
			maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
			while (new Date(drawYear, drawMonth, 1) > maxDraw) {
				drawMonth--;
				if (drawMonth < 0) {
					drawMonth = 11;
					drawYear--;
				}
			}
		}
		// controls and links
		var prevText = this._get(inst, 'prevText');
		prevText = (!navigationAsDateFormat ? prevText : this.formatDate(
			prevText, new Date(drawYear, drawMonth - stepMonths, 1), this._getFormatConfig(inst)));
		var prevBigText = (showBigPrevNext ? this._get(inst, 'prevBigText') : '');
		prevBigText = (!navigationAsDateFormat ? prevBigText : this.formatDate(
			prevBigText, new Date(drawYear, drawMonth - stepBigMonths, 1), this._getFormatConfig(inst)));
		var prev = '<div class="ui-datepicker-prev">' + (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ? 
			(showBigPrevNext ? '<a onclick="jQuery.datepicker._adjustDate(\'#' + inst.id + '\', -' + stepBigMonths + ', \'M\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'prevBigStatus'), initStatus) + '>' + prevBigText + '</a>' : '') +
			'<a onclick="jQuery.datepicker._adjustDate(\'#' + inst.id + '\', -' + stepMonths + ', \'M\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'prevStatus'), initStatus) + '>' + prevText + '</a>' :
			(hideIfNoPrevNext ? '' : '<label>' + prevBigText + '</label><label>' + prevText + '</label>')) + '</div>';
		var nextText = this._get(inst, 'nextText');
		nextText = (!navigationAsDateFormat ? nextText : this.formatDate(
			nextText, new Date(drawYear, drawMonth + stepMonths, 1), this._getFormatConfig(inst)));
		var nextBigText = (showBigPrevNext ? this._get(inst, 'nextBigText') : '');
		nextBigText = (!navigationAsDateFormat ? nextBigText : this.formatDate(
			nextBigText, new Date(drawYear, drawMonth + stepBigMonths, 1), this._getFormatConfig(inst)));
		var next = '<div class="ui-datepicker-next">' + (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
			'<a onclick="jQuery.datepicker._adjustDate(\'#' + inst.id + '\', +' + stepMonths + ', \'M\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'nextStatus'), initStatus) + '>' + nextText + '</a>' +
			(showBigPrevNext ? '<a onclick="jQuery.datepicker._adjustDate(\'#' + inst.id + '\', +' + stepBigMonths + ', \'M\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'nextBigStatus'), initStatus) + '>' + nextBigText + '</a>' : '') :
			(hideIfNoPrevNext ? '' : '<label>' + nextText + '</label><label>' + nextBigText + '</label>')) + '</div>';
		var currentText = this._get(inst, 'currentText');
		var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today); 
		currentText = (!navigationAsDateFormat ? currentText :
			this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
		var html = (prompt ? '<div class="' + this._promptClass + '">' + prompt + '</div>' : '') +
			(closeAtTop && !inst.inline ? controls : '') +
			'<div class="ui-datepicker-links">' + (isRTL ? next : prev) +
			(this._isInRange(inst, gotoDate) ? '<div class="ui-datepicker-current">' +
			'<a onclick="jQuery.datepicker._gotoToday(\'#' + inst.id + '\');"' +
			this._addStatus(showStatus, inst.id, this._get(inst, 'currentStatus'), initStatus) + '>' +
			currentText + '</a></div>' : '') + (isRTL ? prev : next) + '</div>';
		var firstDay = this._get(inst, 'firstDay');
		var changeFirstDay = this._get(inst, 'changeFirstDay');
		var dayNames = this._get(inst, 'dayNames');
		var dayNamesShort = this._get(inst, 'dayNamesShort');
		var dayNamesMin = this._get(inst, 'dayNamesMin');
		var monthNames = this._get(inst, 'monthNames');
		var beforeShowDay = this._get(inst, 'beforeShowDay');
		var highlightWeek = this._get(inst, 'highlightWeek');
		var showOtherMonths = this._get(inst, 'showOtherMonths');
		var showWeeks = this._get(inst, 'showWeeks');
		var calculateWeek = this._get(inst, 'calculateWeek') || this.iso8601Week;
		var weekStatus = this._get(inst, 'weekStatus');
		var status = (showStatus ? this._get(inst, 'dayStatus') || initStatus : '');
		var dateStatus = this._get(inst, 'statusForDate') || this.dateStatus;
		var endDate = inst.endDay ? new Date(inst.endYear, inst.endMonth, inst.endDay) : currentDate;
		for (var row = 0; row < numMonths[0]; row++)
			for (var col = 0; col < numMonths[1]; col++) {
				var selectedDate = new Date(drawYear, drawMonth, inst.selectedDay);
				html += '<div class="ui-datepicker-one-month' + (col == 0 ? ' ui-datepicker-new-row' : '') + '">' +
					this._generateMonthYearHeader(inst, drawMonth, drawYear, minDate, maxDate,
					selectedDate, row > 0 || col > 0, showStatus, initStatus, monthNames) + // draw month headers
					'<table class="ui-datepicker" cellpadding="0" cellspacing="0"><thead>' + 
					'<tr class="ui-datepicker-title-row">' +
					(showWeeks ? '<td' + this._addStatus(showStatus, inst.id, weekStatus, initStatus) + '>' +
					this._get(inst, 'weekHeader') + '</td>' : '');
				for (var dow = 0; dow < 7; dow++) { // days of the week
					var day = (dow + firstDay) % 7;
					var dayStatus = (status.indexOf('DD') > -1 ? status.replace(/DD/, dayNames[day]) :
						status.replace(/D/, dayNamesShort[day]));
					html += '<td' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end-cell"' : '') + '>' +
						(!changeFirstDay ? '<span' :
						'<a onclick="jQuery.datepicker._changeFirstDay(\'#' + inst.id + '\', ' + day + ');"') + 
						this._addStatus(showStatus, inst.id, dayStatus, initStatus) + ' title="' + dayNames[day] + '">' +
						dayNamesMin[day] + (changeFirstDay ? '</a>' : '</span>') + '</td>';
				}
				html += '</tr></thead><tbody>';
				var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
				if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)
					inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
				var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
				var tzDate = new Date(drawYear, drawMonth, 1 - leadDays);
				var utcDate = new Date(drawYear, drawMonth, 1 - leadDays);
				var printDate = utcDate;
				var numRows = (isMultiMonth ? 6 : Math.ceil((leadDays + daysInMonth) / 7)); // calculate the number of rows to generate
				for (var dRow = 0; dRow < numRows; dRow++) { // create date picker rows
					html += '<tr class="ui-datepicker-days-row">' +
						(showWeeks ? '<td class="ui-datepicker-week-col"' +
						this._addStatus(showStatus, inst.id, weekStatus, initStatus) + '>' +
						calculateWeek(printDate) + '</td>' : '');
					for (var dow = 0; dow < 7; dow++) { // create date picker days
						var daySettings = (beforeShowDay ?
							beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);
						var otherMonth = (printDate.getMonth() != drawMonth);
						var unselectable = otherMonth || !daySettings[0] ||
							(minDate && printDate < minDate) || (maxDate && printDate > maxDate);
						html += '<td class="ui-datepicker-days-cell' +
							((dow + firstDay + 6) % 7 >= 5 ? ' ui-datepicker-week-end-cell' : '') + // highlight weekends
							(otherMonth ? ' ui-datepicker-other-month' : '') + // highlight days from other months
							(printDate.getTime() == selectedDate.getTime() && drawMonth == inst.selectedMonth ?
							' ui-datepicker-days-cell-over' : '') + // highlight selected day
							(unselectable ? ' ' + this._unselectableClass : '') +  // highlight unselectable days
							(otherMonth && !showOtherMonths ? '' : ' ' + daySettings[1] + // highlight custom dates
							(printDate.getTime() >= currentDate.getTime() && printDate.getTime() <= endDate.getTime() ?  // in current range
							' ' + this._currentClass : '') + // highlight selected day
							(printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)
							((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') + // cell title
							(unselectable ? (highlightWeek ? ' onmouseover="jQuery(this).parent().addClass(\'ui-datepicker-week-over\');"' + // highlight selection week
							' onmouseout="jQuery(this).parent().removeClass(\'ui-datepicker-week-over\');"' : '') : // unhighlight selection week
							' onmouseover="jQuery(this).addClass(\'ui-datepicker-days-cell-over\')' + // highlight selection
							(highlightWeek ? '.parent().addClass(\'ui-datepicker-week-over\')' : '') + ';' + // highlight selection week
							(!showStatus || (otherMonth && !showOtherMonths) ? '' : 'jQuery(\'#ui-datepicker-status-' +
							inst.id + '\').html(\'' + (dateStatus.apply((inst.input ? inst.input[0] : null),
							[printDate, inst]) || initStatus) +'\');') + '"' +
							' onmouseout="jQuery(this).removeClass(\'ui-datepicker-days-cell-over\')' + // unhighlight selection
							(highlightWeek ? '.parent().removeClass(\'ui-datepicker-week-over\')' : '') + ';' + // unhighlight selection week
							(!showStatus || (otherMonth && !showOtherMonths) ? '' : 'jQuery(\'#ui-datepicker-status-' +
							inst.id + '\').html(\'' + initStatus + '\');') + '" onclick="jQuery.datepicker._selectDay(\'#' +
							inst.id + '\',' + drawMonth + ',' + drawYear + ', this);"') + '>' + // actions
							(otherMonth ? (showOtherMonths ? printDate.getDate() : '&#xa0;') : // display for other months
							(unselectable ? printDate.getDate() : '<a>' + printDate.getDate() + '</a>')) + '</td>'; // display for this month
						tzDate.setDate(tzDate.getDate() + 1);
						utcDate.setUTCDate(utcDate.getUTCDate() + 1);
						printDate = (tzDate > utcDate ? tzDate : utcDate);
					}
					html += '</tr>';
				}
				drawMonth++;
				if (drawMonth > 11) {
					drawMonth = 0;
					drawYear++;
				}
				html += '</tbody></table></div>';
			}
		html += (showStatus ? '<div style="clear: both;"></div><div id="ui-datepicker-status-' + inst.id + 
			'" class="ui-datepicker-status">' + initStatus + '</div>' : '') +
			(!closeAtTop && !inst.inline ? controls : '') +
			'<div style="clear: both;"></div>' + 
			($.browser.msie && parseInt($.browser.version,10) < 7 && !inst.inline ? 
			'<iframe src="javascript:false;" class="ui-datepicker-cover"></iframe>' : '');
		return html;
	},
	
	/* Generate the month and year header. */
	_generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,
			selectedDate, secondary, showStatus, initStatus, monthNames) {
		minDate = (inst.rangeStart && minDate && selectedDate < minDate ? selectedDate : minDate);
		var showMonthAfterYear = this._get(inst, 'showMonthAfterYear');
		var html = '<div class="ui-datepicker-header">';
		var monthHtml = '';
		// month selection
		if (secondary || !this._get(inst, 'changeMonth'))
			monthHtml += monthNames[drawMonth] + '&#xa0;';
		else {
			var inMinYear = (minDate && minDate.getFullYear() == drawYear);
			var inMaxYear = (maxDate && maxDate.getFullYear() == drawYear);
			monthHtml += '<select class="ui-datepicker-new-month" ' +
				'onchange="jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'M\');" ' +
				'onclick="jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +
				this._addStatus(showStatus, inst.id, this._get(inst, 'monthStatus'), initStatus) + '>';
			for (var month = 0; month < 12; month++) {
				if ((!inMinYear || month >= minDate.getMonth()) &&
						(!inMaxYear || month <= maxDate.getMonth()))
					monthHtml += '<option value="' + month + '"' +
						(month == drawMonth ? ' selected="selected"' : '') +
						'>' + monthNames[month] + '</option>';
			}
			monthHtml += '</select>';
		}
		if (!showMonthAfterYear)
			html += monthHtml;
		// year selection
		if (secondary || !this._get(inst, 'changeYear'))
			html += drawYear;
		else {
			// determine range of years to display
			var years = this._get(inst, 'yearRange').split(':');
			var year = 0;
			var endYear = 0;
			if (years.length != 2) {
				year = drawYear - 10;
				endYear = drawYear + 10;
			} else if (years[0].charAt(0) == '+' || years[0].charAt(0) == '-') {
				year = endYear = new Date().getFullYear();
				year += parseInt(years[0], 10);
				endYear += parseInt(years[1], 10);
			} else {
				year = parseInt(years[0], 10);
				endYear = parseInt(years[1], 10);
			}
			year = (minDate ? Math.max(year, minDate.getFullYear()) : year);
			endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);
			html += '<select class="ui-datepicker-new-year" ' +
				'onchange="jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'Y\');" ' +
				'onclick="jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +
				this._addStatus(showStatus, inst.id, this._get(inst, 'yearStatus'), initStatus) + '>';
			for (; year <= endYear; year++) {
				html += '<option value="' + year + '"' +
					(year == drawYear ? ' selected="selected"' : '') +
					'>' + year + '</option>';
			}
			html += '</select>';
		}
		if (showMonthAfterYear)
			html += monthHtml;
		html += '</div>'; // Close datepicker_header
		return html;
	},

	/* Provide code to set and clear the status panel. */
	_addStatus: function(showStatus, id, text, initStatus) {
		return (showStatus ? ' onmouseover="jQuery(\'#ui-datepicker-status-' + id +
			'\').html(\'' + (text || initStatus) + '\');" ' +
			'onmouseout="jQuery(\'#ui-datepicker-status-' + id +
			'\').html(\'' + initStatus + '\');"' : '');
	},

	/* Adjust one of the date sub-fields. */
	_adjustInstDate: function(inst, offset, period) {
		var year = inst.drawYear + (period == 'Y' ? offset : 0);
		var month = inst.drawMonth + (period == 'M' ? offset : 0);
		var day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) +
			(period == 'D' ? offset : 0);
		var date = new Date(year, month, day);
		// ensure it is within the bounds set
		var minDate = this._getMinMaxDate(inst, 'min', true);
		var maxDate = this._getMinMaxDate(inst, 'max');
		date = (minDate && date < minDate ? minDate : date);
		date = (maxDate && date > maxDate ? maxDate : date);
		inst.selectedDay = date.getDate();
		inst.drawMonth = inst.selectedMonth = date.getMonth();
		inst.drawYear = inst.selectedYear = date.getFullYear();
		if (period == 'M' || period == 'Y')
			this._notifyChange(inst);
	},

	/* Notify change of month/year. */
	_notifyChange: function(inst) {
		var onChange = this._get(inst, 'onChangeMonthYear');
		if (onChange)
			onChange.apply((inst.input ? inst.input[0] : null),
				[inst.selectedYear, inst.selectedMonth + 1, inst]);
	},
	
	/* Determine the number of months to show. */
	_getNumberOfMonths: function(inst) {
		var numMonths = this._get(inst, 'numberOfMonths');
		return (numMonths == null ? [1, 1] : (typeof numMonths == 'number' ? [1, numMonths] : numMonths));
	},

	/* Determine the current maximum date - ensure no time components are set - may be overridden for a range. */
	_getMinMaxDate: function(inst, minMax, checkRange) {
		var date = this._determineDate(this._get(inst, minMax + 'Date'), null);
		if (date) {
			date.setHours(0);
			date.setMinutes(0);
			date.setSeconds(0);
			date.setMilliseconds(0);
		}
		return (!checkRange || !inst.rangeStart ? date :
			(!date || inst.rangeStart > date ? inst.rangeStart : date));
	},

	/* Find the number of days in a given month. */
	_getDaysInMonth: function(year, month) {
		return 32 - new Date(year, month, 32).getDate();
	},

	/* Find the day of the week of the first of a month. */
	_getFirstDayOfMonth: function(year, month) {
		return new Date(year, month, 1).getDay();
	},

	/* Determines if we should allow a "next/prev" month display change. */
	_canAdjustMonth: function(inst, offset, curYear, curMonth) {
		var numMonths = this._getNumberOfMonths(inst);
		var date = new Date(curYear, curMonth + (offset < 0 ? offset : numMonths[1]), 1);
		if (offset < 0)
			date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
		return this._isInRange(inst, date);
	},

	/* Is the given date in the accepted range? */
	_isInRange: function(inst, date) {
		// during range selection, use minimum of selected date and range start
		var newMinDate = (!inst.rangeStart ? null :
			new Date(inst.selectedYear, inst.selectedMonth, inst.selectedDay));
		newMinDate = (newMinDate && inst.rangeStart < newMinDate ? inst.rangeStart : newMinDate);
		var minDate = newMinDate || this._getMinMaxDate(inst, 'min');
		var maxDate = this._getMinMaxDate(inst, 'max');
		return ((!minDate || date >= minDate) && (!maxDate || date <= maxDate));
	},
	
	/* Provide the configuration settings for formatting/parsing. */
	_getFormatConfig: function(inst) {
		var shortYearCutoff = this._get(inst, 'shortYearCutoff');
		shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
			new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
		return {shortYearCutoff: shortYearCutoff,
			dayNamesShort: this._get(inst, 'dayNamesShort'), dayNames: this._get(inst, 'dayNames'),
			monthNamesShort: this._get(inst, 'monthNamesShort'), monthNames: this._get(inst, 'monthNames')};
	},

	/* Format the given date for display. */
	_formatDate: function(inst, day, month, year) {
		if (!day) {
			inst.currentDay = inst.selectedDay;
			inst.currentMonth = inst.selectedMonth;
			inst.currentYear = inst.selectedYear;
		}
		var date = (day ? (typeof day == 'object' ? day : new Date(year, month, day)) :
			new Date(inst.currentYear, inst.currentMonth, inst.currentDay));
		return this.formatDate(this._get(inst, 'dateFormat'), date, this._getFormatConfig(inst));
	}
});

/* jQuery extend now ignores nulls! */
function extendRemove(target, props) {
	$.extend(target, props);
	for (var name in props)
		if (props[name] == null || props[name] == undefined)
			target[name] = props[name];
	return target;
};

/* Determine whether an object is an array. */
function isArray(a) {
	return (a && (($.browser.safari && typeof a == 'object' && a.length) ||
		(a.constructor && a.constructor.toString().match(/\Array\(\)/))));
};

/* Invoke the datepicker functionality.
   @param  options  string - a command, optionally followed by additional parameters or
                    Object - settings for attaching new datepicker functionality
   @return  jQuery object */
$.fn.datepicker = function(options){
	
	/* Initialise the date picker. */
	if (!$.datepicker.initialized) {
		$(document.body).append($.datepicker.dpDiv).
			mousedown($.datepicker._checkExternalClick);
		$.datepicker.initialized = true;
	}
	
	var otherArgs = Array.prototype.slice.call(arguments, 1);
	if (typeof options == 'string' && (options == 'isDisabled' || options == 'getDate'))
		return $.datepicker['_' + options + 'Datepicker'].
			apply($.datepicker, [this[0]].concat(otherArgs));
	return this.each(function() {
		typeof options == 'string' ?
			$.datepicker['_' + options + 'Datepicker'].
				apply($.datepicker, [this].concat(otherArgs)) :
			$.datepicker._attachDatepicker(this, options);
	});
};

$.datepicker = new Datepicker(); // singleton instance
$.datepicker.initialized = false;
$.datepicker.uuid = new Date().getTime();

})(jQuery);