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29
30
31$.extend($.ui, { datepicker: { version: "1.11.4" } });
32
33var datepicker_instActive;
34
35function datepicker_getZindex( elem ) {
36	var position, value;
37	while ( elem.length && elem[ 0 ] !== document ) {
38		// Ignore z-index if position is set to a value where z-index is ignored by the browser
39		// This makes behavior of this function consistent across browsers
40		// WebKit always returns auto if the element is positioned
41		position = elem.css( "position" );
42		if ( position === "absolute" || position === "relative" || position === "fixed" ) {
43			// IE returns 0 when zIndex is not specified
44			// other browsers return a string
45			// we ignore the case of nested elements with an explicit value of 0
46			// <div style="z-index: -10;"><div style="z-index: 0;"></div></div>
47			value = parseInt( elem.css( "zIndex" ), 10 );
48			if ( !isNaN( value ) && value !== 0 ) {
49				return value;
50			}
51		}
52		elem = elem.parent();
53	}
54
55	return 0;
56}
57/* Date picker manager.
58   Use the singleton instance of this class, $.datepicker, to interact with the date picker.
59   Settings for (groups of) date pickers are maintained in an instance object,
60   allowing multiple different settings on the same page. */
61
62function Datepicker() {
63	this._curInst = null; // The current instance in use
64	this._keyEvent = false; // If the last event was a key event
65	this._disabledInputs = []; // List of date picker inputs that have been disabled
66	this._datepickerShowing = false; // True if the popup picker is showing , false if not
67	this._inDialog = false; // True if showing within a "dialog", false if not
68	this._mainDivId = "ui-datepicker-div"; // The ID of the main datepicker division
69	this._inlineClass = "ui-datepicker-inline"; // The name of the inline marker class
70	this._appendClass = "ui-datepicker-append"; // The name of the append marker class
71	this._triggerClass = "ui-datepicker-trigger"; // The name of the trigger marker class
72	this._dialogClass = "ui-datepicker-dialog"; // The name of the dialog marker class
73	this._disableClass = "ui-datepicker-disabled"; // The name of the disabled covering marker class
74	this._unselectableClass = "ui-datepicker-unselectable"; // The name of the unselectable cell marker class
75	this._currentClass = "ui-datepicker-current-day"; // The name of the current day marker class
76	this._dayOverClass = "ui-datepicker-days-cell-over"; // The name of the day hover marker class
77	this.regional = []; // Available regional settings, indexed by language code
78	this.regional[""] = { // Default regional settings
79		closeText: "Done", // Display text for close link
80		prevText: "Prev", // Display text for previous month link
81		nextText: "Next", // Display text for next month link
82		currentText: "Today", // Display text for current month link
83		monthNames: ["January","February","March","April","May","June",
84			"July","August","September","October","November","December"], // Names of months for drop-down and formatting
85		monthNamesShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"], // For formatting
86		dayNames: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"], // For formatting
87		dayNamesShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"], // For formatting
88		dayNamesMin: ["Su","Mo","Tu","We","Th","Fr","Sa"], // Column headings for days starting at Sunday
89		weekHeader: "Wk", // Column header for week of the year
90		dateFormat: "mm/dd/yy", // See format options on parseDate
91		firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
92		isRTL: false, // True if right-to-left language, false if left-to-right
93		showMonthAfterYear: false, // True if the year select precedes month, false for month then year
94		yearSuffix: "" // Additional text to append to the year in the month headers
95	};
96	this._defaults = { // Global defaults for all the date picker instances
97		showOn: "focus", // "focus" for popup on focus,
98			// "button" for trigger button, or "both" for either
99		showAnim: "fadeIn", // Name of jQuery animation for popup
100		showOptions: {}, // Options for enhanced animations
101		defaultDate: null, // Used when field is blank: actual date,
102			// +/-number for offset from today, null for today
103		appendText: "", // Display text following the input box, e.g. showing the format
104		buttonText: "...", // Text for trigger button
105		buttonImage: "", // URL for trigger button image
106		buttonImageOnly: false, // True if the image appears alone, false if it appears on a button
107		hideIfNoPrevNext: false, // True to hide next/previous month links
108			// if not applicable, false to just disable them
109		navigationAsDateFormat: false, // True if date formatting applied to prev/today/next links
110		gotoCurrent: false, // True if today link goes back to current selection instead
111		changeMonth: false, // True if month can be selected directly, false if only prev/next
112		changeYear: false, // True if year can be selected directly, false if only prev/next
113		yearRange: "c-10:c+10", // Range of years to display in drop-down,
114			// either relative to today's year (-nn:+nn), relative to currently displayed year
115			// (c-nn:c+nn), absolute (nnnn:nnnn), or a combination of the above (nnnn:-n)
116		showOtherMonths: false, // True to show dates in other months, false to leave blank
117		selectOtherMonths: false, // True to allow selection of dates in other months, false for unselectable
118		showWeek: false, // True to show week of the year, false to not show it
119		calculateWeek: this.iso8601Week, // How to calculate the week of the year,
120			// takes a Date and returns the number of the week for it
121		shortYearCutoff: "+10", // Short year values < this are in the current century,
122			// > this are in the previous century,
123			// string value starting with "+" for current year + value
124		minDate: null, // The earliest selectable date, or null for no limit
125		maxDate: null, // The latest selectable date, or null for no limit
126		duration: "fast", // Duration of display/closure
127		beforeShowDay: null, // Function that takes a date and returns an array with
128			// [0] = true if selectable, false if not, [1] = custom CSS class name(s) or "",
129			// [2] = cell title (optional), e.g. $.datepicker.noWeekends
130		beforeShow: null, // Function that takes an input field and
131			// returns a set of custom settings for the date picker
132		onSelect: null, // Define a callback function when a date is selected
133		onChangeMonthYear: null, // Define a callback function when the month or year is changed
134		onClose: null, // Define a callback function when the datepicker is closed
135		numberOfMonths: 1, // Number of months to show at a time
136		showCurrentAtPos: 0, // The position in multipe months at which to show the current month (starting at 0)
137		stepMonths: 1, // Number of months to step back/forward
138		stepBigMonths: 12, // Number of months to step back/forward for the big links
139		altField: "", // Selector for an alternate field to store selected dates into
140		altFormat: "", // The date format to use for the alternate field
141		constrainInput: true, // The input is constrained by the current date format
142		showButtonPanel: false, // True to show button panel, false to not show it
143		autoSize: false, // True to size the input for the date format, false to leave as is
144		disabled: false // The initial disabled state
145	};
146	$.extend(this._defaults, this.regional[""]);
147	this.regional.en = $.extend( true, {}, this.regional[ "" ]);
148	this.regional[ "en-US" ] = $.extend( true, {}, this.regional.en );
149	this.dpDiv = datepicker_bindHover($("<div id='" + this._mainDivId + "' class='ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all'></div>"));
150}
151
152$.extend(Datepicker.prototype, {
153	/* Class name added to elements to indicate already configured with a date picker. */
154	markerClassName: "hasDatepicker",
155
156	//Keep track of the maximum number of rows displayed (see #7043)
157	maxRows: 4,
158
159	// TODO rename to "widget" when switching to widget factory
160	_widgetDatepicker: function() {
161		return this.dpDiv;
162	},
163
164	/* Override the default settings for all instances of the date picker.
165	 * @param  settings  object - the new settings to use as defaults (anonymous object)
166	 * @return the manager object
167	 */
168	setDefaults: function(settings) {
169		datepicker_extendRemove(this._defaults, settings || {});
170		return this;
171	},
172
173	/* Attach the date picker to a jQuery selection.
174	 * @param  target	element - the target input field or division or span
175	 * @param  settings  object - the new settings to use for this date picker instance (anonymous)
176	 */
177	_attachDatepicker: function(target, settings) {
178		var nodeName, inline, inst;
179		nodeName = target.nodeName.toLowerCase();
180		inline = (nodeName === "div" || nodeName === "span");
181		if (!target.id) {
182			this.uuid += 1;
183			target.id = "dp" + this.uuid;
184		}
185		inst = this._newInst($(target), inline);
186		inst.settings = $.extend({}, settings || {});
187		if (nodeName === "input") {
188			this._connectDatepicker(target, inst);
189		} else if (inline) {
190			this._inlineDatepicker(target, inst);
191		}
192	},
193
194	/* Create a new instance object. */
195	_newInst: function(target, inline) {
196		var id = target[0].id.replace(/([^A-Za-z0-9_\-])/g, "\\\\$1"); // escape jQuery meta chars
197		return {id: id, input: target, // associated target
198			selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
199			drawMonth: 0, drawYear: 0, // month being drawn
200			inline: inline, // is datepicker inline or not
201			dpDiv: (!inline ? this.dpDiv : // presentation div
202			datepicker_bindHover($("<div class='" + this._inlineClass + " ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all'></div>")))};
203	},
204
205	/* Attach the date picker to an input field. */
206	_connectDatepicker: function(target, inst) {
207		var input = $(target);
208		inst.append = $([]);
209		inst.trigger = $([]);
210		if (input.hasClass(this.markerClassName)) {
211			return;
212		}
213		this._attachments(input, inst);
214		input.addClass(this.markerClassName).keydown(this._doKeyDown).
215			keypress(this._doKeyPress).keyup(this._doKeyUp);
216		this._autoSize(inst);
217		$.data(target, "datepicker", inst);
218		//If disabled option is true, disable the datepicker once it has been attached to the input (see ticket #5665)
219		if( inst.settings.disabled ) {
220			this._disableDatepicker( target );
221		}
222	},
223
224	/* Make attachments based on settings. */
225	_attachments: function(input, inst) {
226		var showOn, buttonText, buttonImage,
227			appendText = this._get(inst, "appendText"),
228			isRTL = this._get(inst, "isRTL");
229
230		if (inst.append) {
231			inst.append.remove();
232		}
233		if (appendText) {
234			inst.append = $("<span class='" + this._appendClass + "'>" + appendText + "</span>");
235			input[isRTL ? "before" : "after"](inst.append);
236		}
237
238		input.unbind("focus", this._showDatepicker);
239
240		if (inst.trigger) {
241			inst.trigger.remove();
242		}
243
244		showOn = this._get(inst, "showOn");
245		if (showOn === "focus" || showOn === "both") { // pop-up date picker when in the marked field
246			input.focus(this._showDatepicker);
247		}
248		if (showOn === "button" || showOn === "both") { // pop-up date picker when button clicked
249			buttonText = this._get(inst, "buttonText");
250			buttonImage = this._get(inst, "buttonImage");
251			inst.trigger = $(this._get(inst, "buttonImageOnly") ?
252				$("<img/>").addClass(this._triggerClass).
253					attr({ src: buttonImage, alt: buttonText, title: buttonText }) :
254				$("<button type='button'></button>").addClass(this._triggerClass).
255					html(!buttonImage ? buttonText : $("<img/>").attr(
256					{ src:buttonImage, alt:buttonText, title:buttonText })));
257			input[isRTL ? "before" : "after"](inst.trigger);
258			inst.trigger.click(function() {
259				if ($.datepicker._datepickerShowing && $.datepicker._lastInput === input[0]) {
260					$.datepicker._hideDatepicker();
261				} else if ($.datepicker._datepickerShowing && $.datepicker._lastInput !== input[0]) {
262					$.datepicker._hideDatepicker();
263					$.datepicker._showDatepicker(input[0]);
264				} else {
265					$.datepicker._showDatepicker(input[0]);
266				}
267				return false;
268			});
269		}
270	},
271
272	/* Apply the maximum length for the date format. */
273	_autoSize: function(inst) {
274		if (this._get(inst, "autoSize") && !inst.inline) {
275			var findMax, max, maxI, i,
276				date = new Date(2009, 12 - 1, 20), // Ensure double digits
277				dateFormat = this._get(inst, "dateFormat");
278
279			if (dateFormat.match(/[DM]/)) {
280				findMax = function(names) {
281					max = 0;
282					maxI = 0;
283					for (i = 0; i < names.length; i++) {
284						if (names[i].length > max) {
285							max = names[i].length;
286							maxI = i;
287						}
288					}
289					return maxI;
290				};
291				date.setMonth(findMax(this._get(inst, (dateFormat.match(/MM/) ?
292					"monthNames" : "monthNamesShort"))));
293				date.setDate(findMax(this._get(inst, (dateFormat.match(/DD/) ?
294					"dayNames" : "dayNamesShort"))) + 20 - date.getDay());
295			}
296			inst.input.attr("size", this._formatDate(inst, date).length);
297		}
298	},
299
300	/* Attach an inline date picker to a div. */
301	_inlineDatepicker: function(target, inst) {
302		var divSpan = $(target);
303		if (divSpan.hasClass(this.markerClassName)) {
304			return;
305		}
306		divSpan.addClass(this.markerClassName).append(inst.dpDiv);
307		$.data(target, "datepicker", inst);
308		this._setDate(inst, this._getDefaultDate(inst), true);
309		this._updateDatepicker(inst);
310		this._updateAlternate(inst);
311		//If disabled option is true, disable the datepicker before showing it (see ticket #5665)
312		if( inst.settings.disabled ) {
313			this._disableDatepicker( target );
314		}
315		// Set display:block in place of inst.dpDiv.show() which won't work on disconnected elements
316		// http://bugs.jqueryui.com/ticket/7552 - A Datepicker created on a detached div has zero height
317		inst.dpDiv.css( "display", "block" );
318	},
319
320	/* Pop-up the date picker in a "dialog" box.
321	 * @param  input element - ignored
322	 * @param  date	string or Date - the initial date to display
323	 * @param  onSelect  function - the function to call when a date is selected
324	 * @param  settings  object - update the dialog date picker instance's settings (anonymous object)
325	 * @param  pos int[2] - coordinates for the dialog's position within the screen or
326	 *					event - with x/y coordinates or
327	 *					leave empty for default (screen centre)
328	 * @return the manager object
329	 */
330	_dialogDatepicker: function(input, date, onSelect, settings, pos) {
331		var id, browserWidth, browserHeight, scrollX, scrollY,
332			inst = this._dialogInst; // internal instance
333
334		if (!inst) {
335			this.uuid += 1;
336			id = "dp" + this.uuid;
337			this._dialogInput = $("<input type='text' id='" + id +
338				"' style='position: absolute; top: -100px; width: 0px;'/>");
339			this._dialogInput.keydown(this._doKeyDown);
340			$("body").append(this._dialogInput);
341			inst = this._dialogInst = this._newInst(this._dialogInput, false);
342			inst.settings = {};
343			$.data(this._dialogInput[0], "datepicker", inst);
344		}
345		datepicker_extendRemove(inst.settings, settings || {});
346		date = (date && date.constructor === Date ? this._formatDate(inst, date) : date);
347		this._dialogInput.val(date);
348
349		this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);
350		if (!this._pos) {
351			browserWidth = document.documentElement.clientWidth;
352			browserHeight = document.documentElement.clientHeight;
353			scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
354			scrollY = document.documentElement.scrollTop || document.body.scrollTop;
355			this._pos = // should use actual width/height below
356				[(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];
357		}
358
359		// move input on screen for focus, but hidden behind dialog
360		this._dialogInput.css("left", (this._pos[0] + 20) + "px").css("top", this._pos[1] + "px");
361		inst.settings.onSelect = onSelect;
362		this._inDialog = true;
363		this.dpDiv.addClass(this._dialogClass);
364		this._showDatepicker(this._dialogInput[0]);
365		if ($.blockUI) {
366			$.blockUI(this.dpDiv);
367		}
368		$.data(this._dialogInput[0], "datepicker", inst);
369		return this;
370	},
371
372	/* Detach a datepicker from its control.
373	 * @param  target	element - the target input field or division or span
374	 */
375	_destroyDatepicker: function(target) {
376		var nodeName,
377			$target = $(target),
378			inst = $.data(target, "datepicker");
379
380		if (!$target.hasClass(this.markerClassName)) {
381			return;
382		}
383
384		nodeName = target.nodeName.toLowerCase();
385		$.removeData(target, "datepicker");
386		if (nodeName === "input") {
387			inst.append.remove();
388			inst.trigger.remove();
389			$target.removeClass(this.markerClassName).
390				unbind("focus", this._showDatepicker).
391				unbind("keydown", this._doKeyDown).
392				unbind("keypress", this._doKeyPress).
393				unbind("keyup", this._doKeyUp);
394		} else if (nodeName === "div" || nodeName === "span") {
395			$target.removeClass(this.markerClassName).empty();
396		}
397
398		if ( datepicker_instActive === inst ) {
399			datepicker_instActive = null;
400		}
401	},
402
403	/* Enable the date picker to a jQuery selection.
404	 * @param  target	element - the target input field or division or span
405	 */
406	_enableDatepicker: function(target) {
407		var nodeName, inline,
408			$target = $(target),
409			inst = $.data(target, "datepicker");
410
411		if (!$target.hasClass(this.markerClassName)) {
412			return;
413		}
414
415		nodeName = target.nodeName.toLowerCase();
416		if (nodeName === "input") {
417			target.disabled = false;
418			inst.trigger.filter("button").
419				each(function() { this.disabled = false; }).end().
420				filter("img").css({opacity: "1.0", cursor: ""});
421		} else if (nodeName === "div" || nodeName === "span") {
422			inline = $target.children("." + this._inlineClass);
423			inline.children().removeClass("ui-state-disabled");
424			inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
425				prop("disabled", false);
426		}
427		this._disabledInputs = $.map(this._disabledInputs,
428			function(value) { return (value === target ? null : value); }); // delete entry
429	},
430
431	/* Disable the date picker to a jQuery selection.
432	 * @param  target	element - the target input field or division or span
433	 */
434	_disableDatepicker: function(target) {
435		var nodeName, inline,
436			$target = $(target),
437			inst = $.data(target, "datepicker");
438
439		if (!$target.hasClass(this.markerClassName)) {
440			return;
441		}
442
443		nodeName = target.nodeName.toLowerCase();
444		if (nodeName === "input") {
445			target.disabled = true;
446			inst.trigger.filter("button").
447				each(function() { this.disabled = true; }).end().
448				filter("img").css({opacity: "0.5", cursor: "default"});
449		} else if (nodeName === "div" || nodeName === "span") {
450			inline = $target.children("." + this._inlineClass);
451			inline.children().addClass("ui-state-disabled");
452			inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
453				prop("disabled", true);
454		}
455		this._disabledInputs = $.map(this._disabledInputs,
456			function(value) { return (value === target ? null : value); }); // delete entry
457		this._disabledInputs[this._disabledInputs.length] = target;
458	},
459
460	/* Is the first field in a jQuery collection disabled as a datepicker?
461	 * @param  target	element - the target input field or division or span
462	 * @return boolean - true if disabled, false if enabled
463	 */
464	_isDisabledDatepicker: function(target) {
465		if (!target) {
466			return false;
467		}
468		for (var i = 0; i < this._disabledInputs.length; i++) {
469			if (this._disabledInputs[i] === target) {
470				return true;
471			}
472		}
473		return false;
474	},
475
476	/* Retrieve the instance data for the target control.
477	 * @param  target  element - the target input field or division or span
478	 * @return  object - the associated instance data
479	 * @throws  error if a jQuery problem getting data
480	 */
481	_getInst: function(target) {
482		try {
483			return $.data(target, "datepicker");
484		}
485		catch (err) {
486			throw "Missing instance data for this datepicker";
487		}
488	},
489
490	/* Update or retrieve the settings for a date picker attached to an input field or division.
491	 * @param  target  element - the target input field or division or span
492	 * @param  name	object - the new settings to update or
493	 *				string - the name of the setting to change or retrieve,
494	 *				when retrieving also "all" for all instance settings or
495	 *				"defaults" for all global defaults
496	 * @param  value   any - the new value for the setting
497	 *				(omit if above is an object or to retrieve a value)
498	 */
499	_optionDatepicker: function(target, name, value) {
500		var settings, date, minDate, maxDate,
501			inst = this._getInst(target);
502
503		if (arguments.length === 2 && typeof name === "string") {
504			return (name === "defaults" ? $.extend({}, $.datepicker._defaults) :
505				(inst ? (name === "all" ? $.extend({}, inst.settings) :
506				this._get(inst, name)) : null));
507		}
508
509		settings = name || {};
510		if (typeof name === "string") {
511			settings = {};
512			settings[name] = value;
513		}
514
515		if (inst) {
516			if (this._curInst === inst) {
517				this._hideDatepicker();
518			}
519
520			date = this._getDateDatepicker(target, true);
521			minDate = this._getMinMaxDate(inst, "min");
522			maxDate = this._getMinMaxDate(inst, "max");
523			datepicker_extendRemove(inst.settings, settings);
524			// reformat the old minDate/maxDate values if dateFormat changes and a new minDate/maxDate isn't provided
525			if (minDate !== null && settings.dateFormat !== undefined && settings.minDate === undefined) {
526				inst.settings.minDate = this._formatDate(inst, minDate);
527			}
528			if (maxDate !== null && settings.dateFormat !== undefined && settings.maxDate === undefined) {
529				inst.settings.maxDate = this._formatDate(inst, maxDate);
530			}
531			if ( "disabled" in settings ) {
532				if ( settings.disabled ) {
533					this._disableDatepicker(target);
534				} else {
535					this._enableDatepicker(target);
536				}
537			}
538			this._attachments($(target), inst);
539			this._autoSize(inst);
540			this._setDate(inst, date);
541			this._updateAlternate(inst);
542			this._updateDatepicker(inst);
543		}
544	},
545
546	// change method deprecated
547	_changeDatepicker: function(target, name, value) {
548		this._optionDatepicker(target, name, value);
549	},
550
551	/* Redraw the date picker attached to an input field or division.
552	 * @param  target  element - the target input field or division or span
553	 */
554	_refreshDatepicker: function(target) {
555		var inst = this._getInst(target);
556		if (inst) {
557			this._updateDatepicker(inst);
558		}
559	},
560
561	/* Set the dates for a jQuery selection.
562	 * @param  target element - the target input field or division or span
563	 * @param  date	Date - the new date
564	 */
565	_setDateDatepicker: function(target, date) {
566		var inst = this._getInst(target);
567		if (inst) {
568			this._setDate(inst, date);
569			this._updateDatepicker(inst);
570			this._updateAlternate(inst);
571		}
572	},
573
574	/* Get the date(s) for the first entry in a jQuery selection.
575	 * @param  target element - the target input field or division or span
576	 * @param  noDefault boolean - true if no default date is to be used
577	 * @return Date - the current date
578	 */
579	_getDateDatepicker: function(target, noDefault) {
580		var inst = this._getInst(target);
581		if (inst && !inst.inline) {
582			this._setDateFromField(inst, noDefault);
583		}
584		return (inst ? this._getDate(inst) : null);
585	},
586
587	/* Handle keystrokes. */
588	_doKeyDown: function(event) {
589		var onSelect, dateStr, sel,
590			inst = $.datepicker._getInst(event.target),
591			handled = true,
592			isRTL = inst.dpDiv.is(".ui-datepicker-rtl");
593
594		inst._keyEvent = true;
595		if ($.datepicker._datepickerShowing) {
596			switch (event.keyCode) {
597				case 9: $.datepicker._hideDatepicker();
598						handled = false;
599						break; // hide on tab out
600				case 13: sel = $("td." + $.datepicker._dayOverClass + ":not(." +
601									$.datepicker._currentClass + ")", inst.dpDiv);
602						if (sel[0]) {
603							$.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);
604						}
605
606						onSelect = $.datepicker._get(inst, "onSelect");
607						if (onSelect) {
608							dateStr = $.datepicker._formatDate(inst);
609
610							// trigger custom callback
611							onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);
612						} else {
613							$.datepicker._hideDatepicker();
614						}
615
616						return false; // don't submit the form
617				case 27: $.datepicker._hideDatepicker();
618						break; // hide on escape
619				case 33: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
620							-$.datepicker._get(inst, "stepBigMonths") :
621							-$.datepicker._get(inst, "stepMonths")), "M");
622						break; // previous month/year on page up/+ ctrl
623				case 34: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
624							+$.datepicker._get(inst, "stepBigMonths") :
625							+$.datepicker._get(inst, "stepMonths")), "M");
626						break; // next month/year on page down/+ ctrl
627				case 35: if (event.ctrlKey || event.metaKey) {
628							$.datepicker._clearDate(event.target);
629						}
630						handled = event.ctrlKey || event.metaKey;
631						break; // clear on ctrl or command +end
632				case 36: if (event.ctrlKey || event.metaKey) {
633							$.datepicker._gotoToday(event.target);
634						}
635						handled = event.ctrlKey || event.metaKey;
636						break; // current on ctrl or command +home
637				case 37: if (event.ctrlKey || event.metaKey) {
638							$.datepicker._adjustDate(event.target, (isRTL ? +1 : -1), "D");
639						}
640						handled = event.ctrlKey || event.metaKey;
641						// -1 day on ctrl or command +left
642						if (event.originalEvent.altKey) {
643							$.datepicker._adjustDate(event.target, (event.ctrlKey ?
644								-$.datepicker._get(inst, "stepBigMonths") :
645								-$.datepicker._get(inst, "stepMonths")), "M");
646						}
647						// next month/year on alt +left on Mac
648						break;
649				case 38: if (event.ctrlKey || event.metaKey) {
650							$.datepicker._adjustDate(event.target, -7, "D");
651						}
652						handled = event.ctrlKey || event.metaKey;
653						break; // -1 week on ctrl or command +up
654				case 39: if (event.ctrlKey || event.metaKey) {
655							$.datepicker._adjustDate(event.target, (isRTL ? -1 : +1), "D");
656						}
657						handled = event.ctrlKey || event.metaKey;
658						// +1 day on ctrl or command +right
659						if (event.originalEvent.altKey) {
660							$.datepicker._adjustDate(event.target, (event.ctrlKey ?
661								+$.datepicker._get(inst, "stepBigMonths") :
662								+$.datepicker._get(inst, "stepMonths")), "M");
663						}
664						// next month/year on alt +right
665						break;
666				case 40: if (event.ctrlKey || event.metaKey) {
667							$.datepicker._adjustDate(event.target, +7, "D");
668						}
669						handled = event.ctrlKey || event.metaKey;
670						break; // +1 week on ctrl or command +down
671				default: handled = false;
672			}
673		} else if (event.keyCode === 36 && event.ctrlKey) { // display the date picker on ctrl+home
674			$.datepicker._showDatepicker(this);
675		} else {
676			handled = false;
677		}
678
679		if (handled) {
680			event.preventDefault();
681			event.stopPropagation();
682		}
683	},
684
685	/* Filter entered characters - based on date format. */
686	_doKeyPress: function(event) {
687		var chars, chr,
688			inst = $.datepicker._getInst(event.target);
689
690		if ($.datepicker._get(inst, "constrainInput")) {
691			chars = $.datepicker._possibleChars($.datepicker._get(inst, "dateFormat"));
692			chr = String.fromCharCode(event.charCode == null ? event.keyCode : event.charCode);
693			return event.ctrlKey || event.metaKey || (chr < " " || !chars || chars.indexOf(chr) > -1);
694		}
695	},
696
697	/* Synchronise manual entry and field/alternate field. */
698	_doKeyUp: function(event) {
699		var date,
700			inst = $.datepicker._getInst(event.target);
701
702		if (inst.input.val() !== inst.lastVal) {
703			try {
704				date = $.datepicker.parseDate($.datepicker._get(inst, "dateFormat"),
705					(inst.input ? inst.input.val() : null),
706					$.datepicker._getFormatConfig(inst));
707
708				if (date) { // only if valid
709					$.datepicker._setDateFromField(inst);
710					$.datepicker._updateAlternate(inst);
711					$.datepicker._updateDatepicker(inst);
712				}
713			}
714			catch (err) {
715			}
716		}
717		return true;
718	},
719
720	/* Pop-up the date picker for a given input field.
721	 * If false returned from beforeShow event handler do not show.
722	 * @param  input  element - the input field attached to the date picker or
723	 *					event - if triggered by focus
724	 */
725	_showDatepicker: function(input) {
726		input = input.target || input;
727		if (input.nodeName.toLowerCase() !== "input") { // find from button/image trigger
728			input = $("input", input.parentNode)[0];
729		}
730
731		if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput === input) { // already here
732			return;
733		}
734
735		var inst, beforeShow, beforeShowSettings, isFixed,
736			offset, showAnim, duration;
737
738		inst = $.datepicker._getInst(input);
739		if ($.datepicker._curInst && $.datepicker._curInst !== inst) {
740			$.datepicker._curInst.dpDiv.stop(true, true);
741			if ( inst && $.datepicker._datepickerShowing ) {
742				$.datepicker._hideDatepicker( $.datepicker._curInst.input[0] );
743			}
744		}
745
746		beforeShow = $.datepicker._get(inst, "beforeShow");
747		beforeShowSettings = beforeShow ? beforeShow.apply(input, [input, inst]) : {};
748		if(beforeShowSettings === false){
749			return;
750		}
751		datepicker_extendRemove(inst.settings, beforeShowSettings);
752
753		inst.lastVal = null;
754		$.datepicker._lastInput = input;
755		$.datepicker._setDateFromField(inst);
756
757		if ($.datepicker._inDialog) { // hide cursor
758			input.value = "";
759		}
760		if (!$.datepicker._pos) { // position below input
761			$.datepicker._pos = $.datepicker._findPos(input);
762			$.datepicker._pos[1] += input.offsetHeight; // add the height
763		}
764
765		isFixed = false;
766		$(input).parents().each(function() {
767			isFixed |= $(this).css("position") === "fixed";
768			return !isFixed;
769		});
770
771		offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
772		$.datepicker._pos = null;
773		//to avoid flashes on Firefox
774		inst.dpDiv.empty();
775		// determine sizing offscreen
776		inst.dpDiv.css({position: "absolute", display: "block", top: "-1000px"});
777		$.datepicker._updateDatepicker(inst);
778		// fix width for dynamic number of date pickers
779		// and adjust position before showing
780		offset = $.datepicker._checkOffset(inst, offset, isFixed);
781		inst.dpDiv.css({position: ($.datepicker._inDialog && $.blockUI ?
782			"static" : (isFixed ? "fixed" : "absolute")), display: "none",
783			left: offset.left + "px", top: offset.top + "px"});
784
785		if (!inst.inline) {
786			showAnim = $.datepicker._get(inst, "showAnim");
787			duration = $.datepicker._get(inst, "duration");
788			inst.dpDiv.css( "z-index", datepicker_getZindex( $( input ) ) + 1 );
789			$.datepicker._datepickerShowing = true;
790
791			if ( $.effects && $.effects.effect[ showAnim ] ) {
792				inst.dpDiv.show(showAnim, $.datepicker._get(inst, "showOptions"), duration);
793			} else {
794				inst.dpDiv[showAnim || "show"](showAnim ? duration : null);
795			}
796
797			if ( $.datepicker._shouldFocusInput( inst ) ) {
798				inst.input.focus();
799			}
800
801			$.datepicker._curInst = inst;
802		}
803	},
804
805	/* Generate the date picker content. */
806	_updateDatepicker: function(inst) {
807		this.maxRows = 4; //Reset the max number of rows being displayed (see #7043)
808		datepicker_instActive = inst; // for delegate hover events
809		inst.dpDiv.empty().append(this._generateHTML(inst));
810		this._attachHandlers(inst);
811
812		var origyearshtml,
813			numMonths = this._getNumberOfMonths(inst),
814			cols = numMonths[1],
815			width = 17,
816			activeCell = inst.dpDiv.find( "." + this._dayOverClass + " a" );
817
818		if ( activeCell.length > 0 ) {
819			datepicker_handleMouseover.apply( activeCell.get( 0 ) );
820		}
821
822		inst.dpDiv.removeClass("ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4").width("");
823		if (cols > 1) {
824			inst.dpDiv.addClass("ui-datepicker-multi-" + cols).css("width", (width * cols) + "em");
825		}
826		inst.dpDiv[(numMonths[0] !== 1 || numMonths[1] !== 1 ? "add" : "remove") +
827			"Class"]("ui-datepicker-multi");
828		inst.dpDiv[(this._get(inst, "isRTL") ? "add" : "remove") +
829			"Class"]("ui-datepicker-rtl");
830
831		if (inst === $.datepicker._curInst && $.datepicker._datepickerShowing && $.datepicker._shouldFocusInput( inst ) ) {
832			inst.input.focus();
833		}
834
835		// deffered render of the years select (to avoid flashes on Firefox)
836		if( inst.yearshtml ){
837			origyearshtml = inst.yearshtml;
838			setTimeout(function(){
839				//assure that inst.yearshtml didn't change.
840				if( origyearshtml === inst.yearshtml && inst.yearshtml ){
841					inst.dpDiv.find("select.ui-datepicker-year:first").replaceWith(inst.yearshtml);
842				}
843				origyearshtml = inst.yearshtml = null;
844			}, 0);
845		}
846	},
847
848	// #6694 - don't focus the input if it's already focused
849	// this breaks the change event in IE
850	// Support: IE and jQuery <1.9
851	_shouldFocusInput: function( inst ) {
852		return inst.input && inst.input.is( ":visible" ) && !inst.input.is( ":disabled" ) && !inst.input.is( ":focus" );
853	},
854
855	/* Check positioning to remain on screen. */
856	_checkOffset: function(inst, offset, isFixed) {
857		var dpWidth = inst.dpDiv.outerWidth(),
858			dpHeight = inst.dpDiv.outerHeight(),
859			inputWidth = inst.input ? inst.input.outerWidth() : 0,
860			inputHeight = inst.input ? inst.input.outerHeight() : 0,
861			viewWidth = document.documentElement.clientWidth + (isFixed ? 0 : $(document).scrollLeft()),
862			viewHeight = document.documentElement.clientHeight + (isFixed ? 0 : $(document).scrollTop());
863
864		offset.left -= (this._get(inst, "isRTL") ? (dpWidth - inputWidth) : 0);
865		offset.left -= (isFixed && offset.left === inst.input.offset().left) ? $(document).scrollLeft() : 0;
866		offset.top -= (isFixed && offset.top === (inst.input.offset().top + inputHeight)) ? $(document).scrollTop() : 0;
867
868		// now check if datepicker is showing outside window viewport - move to a better place if so.
869		offset.left -= Math.min(offset.left, (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ?
870			Math.abs(offset.left + dpWidth - viewWidth) : 0);
871		offset.top -= Math.min(offset.top, (offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ?
872			Math.abs(dpHeight + inputHeight) : 0);
873
874		return offset;
875	},
876
877	/* Find an object's position on the screen. */
878	_findPos: function(obj) {
879		var position,
880			inst = this._getInst(obj),
881			isRTL = this._get(inst, "isRTL");
882
883		while (obj && (obj.type === "hidden" || obj.nodeType !== 1 || $.expr.filters.hidden(obj))) {
884			obj = obj[isRTL ? "previousSibling" : "nextSibling"];
885		}
886
887		position = $(obj).offset();
888		return [position.left, position.top];
889	},
890
891	/* Hide the date picker from view.
892	 * @param  input  element - the input field attached to the date picker
893	 */
894	_hideDatepicker: function(input) {
895		var showAnim, duration, postProcess, onClose,
896			inst = this._curInst;
897
898		if (!inst || (input && inst !== $.data(input, "datepicker"))) {
899			return;
900		}
901
902		if (this._datepickerShowing) {
903			showAnim = this._get(inst, "showAnim");
904			duration = this._get(inst, "duration");
905			postProcess = function() {
906				$.datepicker._tidyDialog(inst);
907			};
908
909			// DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
910			if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) ) {
911				inst.dpDiv.hide(showAnim, $.datepicker._get(inst, "showOptions"), duration, postProcess);
912			} else {
913				inst.dpDiv[(showAnim === "slideDown" ? "slideUp" :
914					(showAnim === "fadeIn" ? "fadeOut" : "hide"))]((showAnim ? duration : null), postProcess);
915			}
916
917			if (!showAnim) {
918				postProcess();
919			}
920			this._datepickerShowing = false;
921
922			onClose = this._get(inst, "onClose");
923			if (onClose) {
924				onClose.apply((inst.input ? inst.input[0] : null), [(inst.input ? inst.input.val() : ""), inst]);
925			}
926
927			this._lastInput = null;
928			if (this._inDialog) {
929				this._dialogInput.css({ position: "absolute", left: "0", top: "-100px" });
930				if ($.blockUI) {
931					$.unblockUI();
932					$("body").append(this.dpDiv);
933				}
934			}
935			this._inDialog = false;
936		}
937	},
938
939	/* Tidy up after a dialog display. */
940	_tidyDialog: function(inst) {
941		inst.dpDiv.removeClass(this._dialogClass).unbind(".ui-datepicker-calendar");
942	},
943
944	/* Close date picker if clicked elsewhere. */
945	_checkExternalClick: function(event) {
946		if (!$.datepicker._curInst) {
947			return;
948		}
949
950		var $target = $(event.target),
951			inst = $.datepicker._getInst($target[0]);
952
953		if ( ( ( $target[0].id !== $.datepicker._mainDivId &&
954				$target.parents("#" + $.datepicker._mainDivId).length === 0 &&
955				!$target.hasClass($.datepicker.markerClassName) &&
956				!$target.closest("." + $.datepicker._triggerClass).length &&
957				$.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI) ) ) ||
958			( $target.hasClass($.datepicker.markerClassName) && $.datepicker._curInst !== inst ) ) {
959				$.datepicker._hideDatepicker();
960		}
961	},
962
963	/* Adjust one of the date sub-fields. */
964	_adjustDate: function(id, offset, period) {
965		var target = $(id),
966			inst = this._getInst(target[0]);
967
968		if (this._isDisabledDatepicker(target[0])) {
969			return;
970		}
971		this._adjustInstDate(inst, offset +
972			(period === "M" ? this._get(inst, "showCurrentAtPos") : 0), // undo positioning
973			period);
974		this._updateDatepicker(inst);
975	},
976
977	/* Action for current link. */
978	_gotoToday: function(id) {
979		var date,
980			target = $(id),
981			inst = this._getInst(target[0]);
982
983		if (this._get(inst, "gotoCurrent") && inst.currentDay) {
984			inst.selectedDay = inst.currentDay;
985			inst.drawMonth = inst.selectedMonth = inst.currentMonth;
986			inst.drawYear = inst.selectedYear = inst.currentYear;
987		} else {
988			date = new Date();
989			inst.selectedDay = date.getDate();
990			inst.drawMonth = inst.selectedMonth = date.getMonth();
991			inst.drawYear = inst.selectedYear = date.getFullYear();
992		}
993		this._notifyChange(inst);
994		this._adjustDate(target);
995	},
996
997	/* Action for selecting a new month/year. */
998	_selectMonthYear: function(id, select, period) {
999		var target = $(id),
1000			inst = this._getInst(target[0]);
1001
1002		inst["selected" + (period === "M" ? "Month" : "Year")] =
1003		inst["draw" + (period === "M" ? "Month" : "Year")] =
1004			parseInt(select.options[select.selectedIndex].value,10);
1005
1006		this._notifyChange(inst);
1007		this._adjustDate(target);
1008	},
1009
1010	/* Action for selecting a day. */
1011	_selectDay: function(id, month, year, td) {
1012		var inst,
1013			target = $(id);
1014
1015		if ($(td).hasClass(this._unselectableClass) || this._isDisabledDatepicker(target[0])) {
1016			return;
1017		}
1018
1019		inst = this._getInst(target[0]);
1020		inst.selectedDay = inst.currentDay = $("a", td).html();
1021		inst.selectedMonth = inst.currentMonth = month;
1022		inst.selectedYear = inst.currentYear = year;
1023		this._selectDate(id, this._formatDate(inst,
1024			inst.currentDay, inst.currentMonth, inst.currentYear));
1025	},
1026
1027	/* Erase the input field and hide the date picker. */
1028	_clearDate: function(id) {
1029		var target = $(id);
1030		this._selectDate(target, "");
1031	},
1032
1033	/* Update the input field with the selected date. */
1034	_selectDate: function(id, dateStr) {
1035		var onSelect,
1036			target = $(id),
1037			inst = this._getInst(target[0]);
1038
1039		dateStr = (dateStr != null ? dateStr : this._formatDate(inst));
1040		if (inst.input) {
1041			inst.input.val(dateStr);
1042		}
1043		this._updateAlternate(inst);
1044
1045		onSelect = this._get(inst, "onSelect");
1046		if (onSelect) {
1047			onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
1048		} else if (inst.input) {
1049			inst.input.trigger("change"); // fire the change event
1050		}
1051
1052		if (inst.inline){
1053			this._updateDatepicker(inst);
1054		} else {
1055			this._hideDatepicker();
1056			this._lastInput = inst.input[0];
1057			if (typeof(inst.input[0]) !== "object") {
1058				inst.input.focus(); // restore focus
1059			}
1060			this._lastInput = null;
1061		}
1062	},
1063
1064	/* Update any alternate field to synchronise with the main field. */
1065	_updateAlternate: function(inst) {
1066		var altFormat, date, dateStr,
1067			altField = this._get(inst, "altField");
1068
1069		if (altField) { // update alternate field too
1070			altFormat = this._get(inst, "altFormat") || this._get(inst, "dateFormat");
1071			date = this._getDate(inst);
1072			dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));
1073			$(altField).each(function() { $(this).val(dateStr); });
1074		}
1075	},
1076
1077	/* Set as beforeShowDay function to prevent selection of weekends.
1078	 * @param  date  Date - the date to customise
1079	 * @return [boolean, string] - is this date selectable?, what is its CSS class?
1080	 */
1081	noWeekends: function(date) {
1082		var day = date.getDay();
1083		return [(day > 0 && day < 6), ""];
1084	},
1085
1086	/* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
1087	 * @param  date  Date - the date to get the week for
1088	 * @return  number - the number of the week within the year that contains this date
1089	 */
1090	iso8601Week: function(date) {
1091		var time,
1092			checkDate = new Date(date.getTime());
1093
1094		// Find Thursday of this week starting on Monday
1095		checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
1096
1097		time = checkDate.getTime();
1098		checkDate.setMonth(0); // Compare with Jan 1
1099		checkDate.setDate(1);
1100		return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
1101	},
1102
1103	/* Parse a string value into a date object.
1104	 * See formatDate below for the possible formats.
1105	 *
1106	 * @param  format string - the expected format of the date
1107	 * @param  value string - the date in the above format
1108	 * @param  settings Object - attributes include:
1109	 *					shortYearCutoff  number - the cutoff year for determining the century (optional)
1110	 *					dayNamesShort	string[7] - abbreviated names of the days from Sunday (optional)
1111	 *					dayNames		string[7] - names of the days from Sunday (optional)
1112	 *					monthNamesShort string[12] - abbreviated names of the months (optional)
1113	 *					monthNames		string[12] - names of the months (optional)
1114	 * @return  Date - the extracted date value or null if value is blank
1115	 */
1116	parseDate: function (format, value, settings) {
1117		if (format == null || value == null) {
1118			throw "Invalid arguments";
1119		}
1120
1121		value = (typeof value === "object" ? value.toString() : value + "");
1122		if (value === "") {
1123			return null;
1124		}
1125
1126		var iFormat, dim, extra,
1127			iValue = 0,
1128			shortYearCutoffTemp = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff,
1129			shortYearCutoff = (typeof shortYearCutoffTemp !== "string" ? shortYearCutoffTemp :
1130				new Date().getFullYear() % 100 + parseInt(shortYearCutoffTemp, 10)),
1131			dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort,
1132			dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames,
1133			monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort,
1134			monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames,
1135			year = -1,
1136			month = -1,
1137			day = -1,
1138			doy = -1,
1139			literal = false,
1140			date,
1141			// Check whether a format character is doubled
1142			lookAhead = function(match) {
1143				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
1144				if (matches) {
1145					iFormat++;
1146				}
1147				return matches;
1148			},
1149			// Extract a number from the string value
1150			getNumber = function(match) {
1151				var isDoubled = lookAhead(match),
1152					size = (match === "@" ? 14 : (match === "!" ? 20 :
1153					(match === "y" && isDoubled ? 4 : (match === "o" ? 3 : 2)))),
1154					minSize = (match === "y" ? size : 1),
1155					digits = new RegExp("^\\d{" + minSize + "," + size + "}"),
1156					num = value.substring(iValue).match(digits);
1157				if (!num) {
1158					throw "Missing number at position " + iValue;
1159				}
1160				iValue += num[0].length;
1161				return parseInt(num[0], 10);
1162			},
1163			// Extract a name from the string value and convert to an index
1164			getName = function(match, shortNames, longNames) {
1165				var index = -1,
1166					names = $.map(lookAhead(match) ? longNames : shortNames, function (v, k) {
1167						return [ [k, v] ];
1168					}).sort(function (a, b) {
1169						return -(a[1].length - b[1].length);
1170					});
1171
1172				$.each(names, function (i, pair) {
1173					var name = pair[1];
1174					if (value.substr(iValue, name.length).toLowerCase() === name.toLowerCase()) {
1175						index = pair[0];
1176						iValue += name.length;
1177						return false;
1178					}
1179				});
1180				if (index !== -1) {
1181					return index + 1;
1182				} else {
1183					throw "Unknown name at position " + iValue;
1184				}
1185			},
1186			// Confirm that a literal character matches the string value
1187			checkLiteral = function() {
1188				if (value.charAt(iValue) !== format.charAt(iFormat)) {
1189					throw "Unexpected literal at position " + iValue;
1190				}
1191				iValue++;
1192			};
1193
1194		for (iFormat = 0; iFormat < format.length; iFormat++) {
1195			if (literal) {
1196				if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
1197					literal = false;
1198				} else {
1199					checkLiteral();
1200				}
1201			} else {
1202				switch (format.charAt(iFormat)) {
1203					case "d":
1204						day = getNumber("d");
1205						break;
1206					case "D":
1207						getName("D", dayNamesShort, dayNames);
1208						break;
1209					case "o":
1210						doy = getNumber("o");
1211						break;
1212					case "m":
1213						month = getNumber("m");
1214						break;
1215					case "M":
1216						month = getName("M", monthNamesShort, monthNames);
1217						break;
1218					case "y":
1219						year = getNumber("y");
1220						break;
1221					case "@":
1222						date = new Date(getNumber("@"));
1223						year = date.getFullYear();
1224						month = date.getMonth() + 1;
1225						day = date.getDate();
1226						break;
1227					case "!":
1228						date = new Date((getNumber("!") - this._ticksTo1970) / 10000);
1229						year = date.getFullYear();
1230						month = date.getMonth() + 1;
1231						day = date.getDate();
1232						break;
1233					case "'":
1234						if (lookAhead("'")){
1235							checkLiteral();
1236						} else {
1237							literal = true;
1238						}
1239						break;
1240					default:
1241						checkLiteral();
1242				}
1243			}
1244		}
1245
1246		if (iValue < value.length){
1247			extra = value.substr(iValue);
1248			if (!/^\s+/.test(extra)) {
1249				throw "Extra/unparsed characters found in date: " + extra;
1250			}
1251		}
1252
1253		if (year === -1) {
1254			year = new Date().getFullYear();
1255		} else if (year < 100) {
1256			year += new Date().getFullYear() - new Date().getFullYear() % 100 +
1257				(year <= shortYearCutoff ? 0 : -100);
1258		}
1259
1260		if (doy > -1) {
1261			month = 1;
1262			day = doy;
1263			do {
1264				dim = this._getDaysInMonth(year, month - 1);
1265				if (day <= dim) {
1266					break;
1267				}
1268				month++;
1269				day -= dim;
1270			} while (true);
1271		}
1272
1273		date = this._daylightSavingAdjust(new Date(year, month - 1, day));
1274		if (date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day) {
1275			throw "Invalid date"; // E.g. 31/02/00
1276		}
1277		return date;
1278	},
1279
1280	/* Standard date formats. */
1281	ATOM: "yy-mm-dd", // RFC 3339 (ISO 8601)
1282	COOKIE: "D, dd M yy",
1283	ISO_8601: "yy-mm-dd",
1284	RFC_822: "D, d M y",
1285	RFC_850: "DD, dd-M-y",
1286	RFC_1036: "D, d M y",
1287	RFC_1123: "D, d M yy",
1288	RFC_2822: "D, d M yy",
1289	RSS: "D, d M y", // RFC 822
1290	TICKS: "!",
1291	TIMESTAMP: "@",
1292	W3C: "yy-mm-dd", // ISO 8601
1293
1294	_ticksTo1970: (((1970 - 1) * 365 + Math.floor(1970 / 4) - Math.floor(1970 / 100) +
1295		Math.floor(1970 / 400)) * 24 * 60 * 60 * 10000000),
1296
1297	/* Format a date object into a string value.
1298	 * The format can be combinations of the following:
1299	 * d  - day of month (no leading zero)
1300	 * dd - day of month (two digit)
1301	 * o  - day of year (no leading zeros)
1302	 * oo - day of year (three digit)
1303	 * D  - day name short
1304	 * DD - day name long
1305	 * m  - month of year (no leading zero)
1306	 * mm - month of year (two digit)
1307	 * M  - month name short
1308	 * MM - month name long
1309	 * y  - year (two digit)
1310	 * yy - year (four digit)
1311	 * @ - Unix timestamp (ms since 01/01/1970)
1312	 * ! - Windows ticks (100ns since 01/01/0001)
1313	 * "..." - literal text
1314	 * '' - single quote
1315	 *
1316	 * @param  format string - the desired format of the date
1317	 * @param  date Date - the date value to format
1318	 * @param  settings Object - attributes include:
1319	 *					dayNamesShort	string[7] - abbreviated names of the days from Sunday (optional)
1320	 *					dayNames		string[7] - names of the days from Sunday (optional)
1321	 *					monthNamesShort string[12] - abbreviated names of the months (optional)
1322	 *					monthNames		string[12] - names of the months (optional)
1323	 * @return  string - the date in the above format
1324	 */
1325	formatDate: function (format, date, settings) {
1326		if (!date) {
1327			return "";
1328		}
1329
1330		var iFormat,
1331			dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort,
1332			dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames,
1333			monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort,
1334			monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames,
1335			// Check whether a format character is doubled
1336			lookAhead = function(match) {
1337				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
1338				if (matches) {
1339					iFormat++;
1340				}
1341				return matches;
1342			},
1343			// Format a number, with leading zero if necessary
1344			formatNumber = function(match, value, len) {
1345				var num = "" + value;
1346				if (lookAhead(match)) {
1347					while (num.length < len) {
1348						num = "0" + num;
1349					}
1350				}
1351				return num;
1352			},
1353			// Format a name, short or long as requested
1354			formatName = function(match, value, shortNames, longNames) {
1355				return (lookAhead(match) ? longNames[value] : shortNames[value]);
1356			},
1357			output = "",
1358			literal = false;
1359
1360		if (date) {
1361			for (iFormat = 0; iFormat < format.length; iFormat++) {
1362				if (literal) {
1363					if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
1364						literal = false;
1365					} else {
1366						output += format.charAt(iFormat);
1367					}
1368				} else {
1369					switch (format.charAt(iFormat)) {
1370						case "d":
1371							output += formatNumber("d", date.getDate(), 2);
1372							break;
1373						case "D":
1374							output += formatName("D", date.getDay(), dayNamesShort, dayNames);
1375							break;
1376						case "o":
1377							output += formatNumber("o",
1378								Math.round((new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime() - new Date(date.getFullYear(), 0, 0).getTime()) / 86400000), 3);
1379							break;
1380						case "m":
1381							output += formatNumber("m", date.getMonth() + 1, 2);
1382							break;
1383						case "M":
1384							output += formatName("M", date.getMonth(), monthNamesShort, monthNames);
1385							break;
1386						case "y":
1387							output += (lookAhead("y") ? date.getFullYear() :
1388								(date.getYear() % 100 < 10 ? "0" : "") + date.getYear() % 100);
1389							break;
1390						case "@":
1391							output += date.getTime();
1392							break;
1393						case "!":
1394							output += date.getTime() * 10000 + this._ticksTo1970;
1395							break;
1396						case "'":
1397							if (lookAhead("'")) {
1398								output += "'";
1399							} else {
1400								literal = true;
1401							}
1402							break;
1403						default:
1404							output += format.charAt(iFormat);
1405					}
1406				}
1407			}
1408		}
1409		return output;
1410	},
1411
1412	/* Extract all possible characters from the date format. */
1413	_possibleChars: function (format) {
1414		var iFormat,
1415			chars = "",
1416			literal = false,
1417			// Check whether a format character is doubled
1418			lookAhead = function(match) {
1419				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
1420				if (matches) {
1421					iFormat++;
1422				}
1423				return matches;
1424			};
1425
1426		for (iFormat = 0; iFormat < format.length; iFormat++) {
1427			if (literal) {
1428				if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
1429					literal = false;
1430				} else {
1431					chars += format.charAt(iFormat);
1432				}
1433			} else {
1434				switch (format.charAt(iFormat)) {
1435					case "d": case "m": case "y": case "@":
1436						chars += "0123456789";
1437						break;
1438					case "D": case "M":
1439						return null; // Accept anything
1440					case "'":
1441						if (lookAhead("'")) {
1442							chars += "'";
1443						} else {
1444							literal = true;
1445						}
1446						break;
1447					default:
1448						chars += format.charAt(iFormat);
1449				}
1450			}
1451		}
1452		return chars;
1453	},
1454
1455	/* Get a setting value, defaulting if necessary. */
1456	_get: function(inst, name) {
1457		return inst.settings[name] !== undefined ?
1458			inst.settings[name] : this._defaults[name];
1459	},
1460
1461	/* Parse existing date and initialise date picker. */
1462	_setDateFromField: function(inst, noDefault) {
1463		if (inst.input.val() === inst.lastVal) {
1464			return;
1465		}
1466
1467		var dateFormat = this._get(inst, "dateFormat"),
1468			dates = inst.lastVal = inst.input ? inst.input.val() : null,
1469			defaultDate = this._getDefaultDate(inst),
1470			date = defaultDate,
1471			settings = this._getFormatConfig(inst);
1472
1473		try {
1474			date = this.parseDate(dateFormat, dates, settings) || defaultDate;
1475		} catch (event) {
1476			dates = (noDefault ? "" : dates);
1477		}
1478		inst.selectedDay = date.getDate();
1479		inst.drawMonth = inst.selectedMonth = date.getMonth();
1480		inst.drawYear = inst.selectedYear = date.getFullYear();
1481		inst.currentDay = (dates ? date.getDate() : 0);
1482		inst.currentMonth = (dates ? date.getMonth() : 0);
1483		inst.currentYear = (dates ? date.getFullYear() : 0);
1484		this._adjustInstDate(inst);
1485	},
1486
1487	/* Retrieve the default date shown on opening. */
1488	_getDefaultDate: function(inst) {
1489		return this._restrictMinMax(inst,
1490			this._determineDate(inst, this._get(inst, "defaultDate"), new Date()));
1491	},
1492
1493	/* A date may be specified as an exact value or a relative one. */
1494	_determineDate: function(inst, date, defaultDate) {
1495		var offsetNumeric = function(offset) {
1496				var date = new Date();
1497				date.setDate(date.getDate() + offset);
1498				return date;
1499			},
1500			offsetString = function(offset) {
1501				try {
1502					return $.datepicker.parseDate($.datepicker._get(inst, "dateFormat"),
1503						offset, $.datepicker._getFormatConfig(inst));
1504				}
1505				catch (e) {
1506					// Ignore
1507				}
1508
1509				var date = (offset.toLowerCase().match(/^c/) ?
1510					$.datepicker._getDate(inst) : null) || new Date(),
1511					year = date.getFullYear(),
1512					month = date.getMonth(),
1513					day = date.getDate(),
1514					pattern = /([+\-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g,
1515					matches = pattern.exec(offset);
1516
1517				while (matches) {
1518					switch (matches[2] || "d") {
1519						case "d" : case "D" :
1520							day += parseInt(matches[1],10); break;
1521						case "w" : case "W" :
1522							day += parseInt(matches[1],10) * 7; break;
1523						case "m" : case "M" :
1524							month += parseInt(matches[1],10);
1525							day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
1526							break;
1527						case "y": case "Y" :
1528							year += parseInt(matches[1],10);
1529							day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
1530							break;
1531					}
1532					matches = pattern.exec(offset);
1533				}
1534				return new Date(year, month, day);
1535			},
1536			newDate = (date == null || date === "" ? defaultDate : (typeof date === "string" ? offsetString(date) :
1537				(typeof date === "number" ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : new Date(date.getTime()))));
1538
1539		newDate = (newDate && newDate.toString() === "Invalid Date" ? defaultDate : newDate);
1540		if (newDate) {
1541			newDate.setHours(0);
1542			newDate.setMinutes(0);
1543			newDate.setSeconds(0);
1544			newDate.setMilliseconds(0);
1545		}
1546		return this._daylightSavingAdjust(newDate);
1547	},
1548
1549	/* Handle switch to/from daylight saving.
1550	 * Hours may be non-zero on daylight saving cut-over:
1551	 * > 12 when midnight changeover, but then cannot generate
1552	 * midnight datetime, so jump to 1AM, otherwise reset.
1553	 * @param  date  (Date) the date to check
1554	 * @return  (Date) the corrected date
1555	 */
1556	_daylightSavingAdjust: function(date) {
1557		if (!date) {
1558			return null;
1559		}
1560		date.setHours(date.getHours() > 12 ? date.getHours() + 2 : 0);
1561		return date;
1562	},
1563
1564	/* Set the date(s) directly. */
1565	_setDate: function(inst, date, noChange) {
1566		var clear = !date,
1567			origMonth = inst.selectedMonth,
1568			origYear = inst.selectedYear,
1569			newDate = this._restrictMinMax(inst, this._determineDate(inst, date, new Date()));
1570
1571		inst.selectedDay = inst.currentDay = newDate.getDate();
1572		inst.drawMonth = inst.selectedMonth = inst.currentMonth = newDate.getMonth();
1573		inst.drawYear = inst.selectedYear = inst.currentYear = newDate.getFullYear();
1574		if ((origMonth !== inst.selectedMonth || origYear !== inst.selectedYear) && !noChange) {
1575			this._notifyChange(inst);
1576		}
1577		this._adjustInstDate(inst);
1578		if (inst.input) {
1579			inst.input.val(clear ? "" : this._formatDate(inst));
1580		}
1581	},
1582
1583	/* Retrieve the date(s) directly. */
1584	_getDate: function(inst) {
1585		var startDate = (!inst.currentYear || (inst.input && inst.input.val() === "") ? null :
1586			this._daylightSavingAdjust(new Date(
1587			inst.currentYear, inst.currentMonth, inst.currentDay)));
1588			return startDate;
1589	},
1590
1591	/* Attach the onxxx handlers.  These are declared statically so
1592	 * they work with static code transformers like Caja.
1593	 */
1594	_attachHandlers: function(inst) {
1595		var stepMonths = this._get(inst, "stepMonths"),
1596			id = "#" + inst.id.replace( /\\\\/g, "\\" );
1597		inst.dpDiv.find("[data-handler]").map(function () {
1598			var handler = {
1599				prev: function () {
1600					$.datepicker._adjustDate(id, -stepMonths, "M");
1601				},
1602				next: function () {
1603					$.datepicker._adjustDate(id, +stepMonths, "M");
1604				},
1605				hide: function () {
1606					$.datepicker._hideDatepicker();
1607				},
1608				today: function () {
1609					$.datepicker._gotoToday(id);
1610				},
1611				selectDay: function () {
1612					$.datepicker._selectDay(id, +this.getAttribute("data-month"), +this.getAttribute("data-year"), this);
1613					return false;
1614				},
1615				selectMonth: function () {
1616					$.datepicker._selectMonthYear(id, this, "M");
1617					return false;
1618				},
1619				selectYear: function () {
1620					$.datepicker._selectMonthYear(id, this, "Y");
1621					return false;
1622				}
1623			};
1624			$(this).bind(this.getAttribute("data-event"), handler[this.getAttribute("data-handler")]);
1625		});
1626	},
1627
1628	/* Generate the HTML for the current state of the date picker. */
1629	_generateHTML: function(inst) {
1630		var maxDraw, prevText, prev, nextText, next, currentText, gotoDate,
1631			controls, buttonPanel, firstDay, showWeek, dayNames, dayNamesMin,
1632			monthNames, monthNamesShort, beforeShowDay, showOtherMonths,
1633			selectOtherMonths, defaultDate, html, dow, row, group, col, selectedDate,
1634			cornerClass, calender, thead, day, daysInMonth, leadDays, curRows, numRows,
1635			printDate, dRow, tbody, daySettings, otherMonth, unselectable,
1636			tempDate = new Date(),
1637			today = this._daylightSavingAdjust(
1638				new Date(tempDate.getFullYear(), tempDate.getMonth(), tempDate.getDate())), // clear time
1639			isRTL = this._get(inst, "isRTL"),
1640			showButtonPanel = this._get(inst, "showButtonPanel"),
1641			hideIfNoPrevNext = this._get(inst, "hideIfNoPrevNext"),
1642			navigationAsDateFormat = this._get(inst, "navigationAsDateFormat"),
1643			numMonths = this._getNumberOfMonths(inst),
1644			showCurrentAtPos = this._get(inst, "showCurrentAtPos"),
1645			stepMonths = this._get(inst, "stepMonths"),
1646			isMultiMonth = (numMonths[0] !== 1 || numMonths[1] !== 1),
1647			currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
1648				new Date(inst.currentYear, inst.currentMonth, inst.currentDay))),
1649			minDate = this._getMinMaxDate(inst, "min"),
1650			maxDate = this._getMinMaxDate(inst, "max"),
1651			drawMonth = inst.drawMonth - showCurrentAtPos,
1652			drawYear = inst.drawYear;
1653
1654		if (drawMonth < 0) {
1655			drawMonth += 12;
1656			drawYear--;
1657		}
1658		if (maxDate) {
1659			maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
1660				maxDate.getMonth() - (numMonths[0] * numMonths[1]) + 1, maxDate.getDate()));
1661			maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
1662			while (this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1)) > maxDraw) {
1663				drawMonth--;
1664				if (drawMonth < 0) {
1665					drawMonth = 11;
1666					drawYear--;
1667				}
1668			}
1669		}
1670		inst.drawMonth = drawMonth;
1671		inst.drawYear = drawYear;
1672
1673		prevText = this._get(inst, "prevText");
1674		prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,
1675			this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),
1676			this._getFormatConfig(inst)));
1677
1678		prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
1679			"<a class='ui-datepicker-prev ui-corner-all' data-handler='prev' data-event='click'" +
1680			" title='" + prevText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "e" : "w") + "'>" + prevText + "</span></a>" :
1681			(hideIfNoPrevNext ? "" : "<a class='ui-datepicker-prev ui-corner-all ui-state-disabled' title='"+ prevText +"'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "e" : "w") + "'>" + prevText + "</span></a>"));
1682
1683		nextText = this._get(inst, "nextText");
1684		nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,
1685			this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),
1686			this._getFormatConfig(inst)));
1687
1688		next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
1689			"<a class='ui-datepicker-next ui-corner-all' data-handler='next' data-event='click'" +
1690			" title='" + nextText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "w" : "e") + "'>" + nextText + "</span></a>" :
1691			(hideIfNoPrevNext ? "" : "<a class='ui-datepicker-next ui-corner-all ui-state-disabled' title='"+ nextText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "w" : "e") + "'>" + nextText + "</span></a>"));
1692
1693		currentText = this._get(inst, "currentText");
1694		gotoDate = (this._get(inst, "gotoCurrent") && inst.currentDay ? currentDate : today);
1695		currentText = (!navigationAsDateFormat ? currentText :
1696			this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
1697
1698		controls = (!inst.inline ? "<button type='button' class='ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all' data-handler='hide' data-event='click'>" +
1699			this._get(inst, "closeText") + "</button>" : "");
1700
1701		buttonPanel = (showButtonPanel) ? "<div class='ui-datepicker-buttonpane ui-widget-content'>" + (isRTL ? controls : "") +
1702			(this._isInRange(inst, gotoDate) ? "<button type='button' class='ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all' data-handler='today' data-event='click'" +
1703			">" + currentText + "</button>" : "") + (isRTL ? "" : controls) + "</div>" : "";
1704
1705		firstDay = parseInt(this._get(inst, "firstDay"),10);
1706		firstDay = (isNaN(firstDay) ? 0 : firstDay);
1707
1708		showWeek = this._get(inst, "showWeek");
1709		dayNames = this._get(inst, "dayNames");
1710		dayNamesMin = this._get(inst, "dayNamesMin");
1711		monthNames = this._get(inst, "monthNames");
1712		monthNamesShort = this._get(inst, "monthNamesShort");
1713		beforeShowDay = this._get(inst, "beforeShowDay");
1714		showOtherMonths = this._get(inst, "showOtherMonths");
1715		selectOtherMonths = this._get(inst, "selectOtherMonths");
1716		defaultDate = this._getDefaultDate(inst);
1717		html = "";
1718		dow;
1719		for (row = 0; row < numMonths[0]; row++) {
1720			group = "";
1721			this.maxRows = 4;
1722			for (col = 0; col < numMonths[1]; col++) {
1723				selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));
1724				cornerClass = " ui-corner-all";
1725				calender = "";
1726				if (isMultiMonth) {
1727					calender += "<div class='ui-datepicker-group";
1728					if (numMonths[1] > 1) {
1729						switch (col) {
1730							case 0: calender += " ui-datepicker-group-first";
1731								cornerClass = " ui-corner-" + (isRTL ? "right" : "left"); break;
1732							case numMonths[1]-1: calender += " ui-datepicker-group-last";
1733								cornerClass = " ui-corner-" + (isRTL ? "left" : "right"); break;
1734							default: calender += " ui-datepicker-group-middle"; cornerClass = ""; break;
1735						}
1736					}
1737					calender += "'>";
1738				}
1739				calender += "<div class='ui-datepicker-header ui-widget-header ui-helper-clearfix" + cornerClass + "'>" +
1740					(/all|left/.test(cornerClass) && row === 0 ? (isRTL ? next : prev) : "") +
1741					(/all|right/.test(cornerClass) && row === 0 ? (isRTL ? prev : next) : "") +
1742					this._generateMonthYearHeader(inst, drawMonth, drawYear, minDate, maxDate,
1743					row > 0 || col > 0, monthNames, monthNamesShort) + // draw month headers
1744					"</div><table class='ui-datepicker-calendar'><thead>" +
1745					"<tr>";
1746				thead = (showWeek ? "<th class='ui-datepicker-week-col'>" + this._get(inst, "weekHeader") + "</th>" : "");
1747				for (dow = 0; dow < 7; dow++) { // days of the week
1748					day = (dow + firstDay) % 7;
1749					thead += "<th scope='col'" + ((dow + firstDay + 6) % 7 >= 5 ? " class='ui-datepicker-week-end'" : "") + ">" +
1750						"<span title='" + dayNames[day] + "'>" + dayNamesMin[day] + "</span></th>";
1751				}
1752				calender += thead + "</tr></thead><tbody>";
1753				daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
1754				if (drawYear === inst.selectedYear && drawMonth === inst.selectedMonth) {
1755					inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
1756				}
1757				leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
1758				curRows = Math.ceil((leadDays + daysInMonth) / 7); // calculate the number of rows to generate
1759				numRows = (isMultiMonth ? this.maxRows > curRows ? this.maxRows : curRows : curRows); //If multiple months, use the higher number of rows (see #7043)
1760				this.maxRows = numRows;
1761				printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
1762				for (dRow = 0; dRow < numRows; dRow++) { // create date picker rows
1763					calender += "<tr>";
1764					tbody = (!showWeek ? "" : "<td class='ui-datepicker-week-col'>" +
1765						this._get(inst, "calculateWeek")(printDate) + "</td>");
1766					for (dow = 0; dow < 7; dow++) { // create date picker days
1767						daySettings = (beforeShowDay ?
1768							beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, ""]);
1769						otherMonth = (printDate.getMonth() !== drawMonth);
1770						unselectable = (otherMonth && !selectOtherMonths) || !daySettings[0] ||
1771							(minDate && printDate < minDate) || (maxDate && printDate > maxDate);
1772						tbody += "<td class='" +
1773							((dow + firstDay + 6) % 7 >= 5 ? " ui-datepicker-week-end" : "") + // highlight weekends
1774							(otherMonth ? " ui-datepicker-other-month" : "") + // highlight days from other months
1775							((printDate.getTime() === selectedDate.getTime() && drawMonth === inst.selectedMonth && inst._keyEvent) || // user pressed key
1776							(defaultDate.getTime() === printDate.getTime() && defaultDate.getTime() === selectedDate.getTime()) ?
1777							// or defaultDate is current printedDate and defaultDate is selectedDate
1778							" " + this._dayOverClass : "") + // highlight selected day
1779							(unselectable ? " " + this._unselectableClass + " ui-state-disabled": "") +  // highlight unselectable days
1780							(otherMonth && !showOtherMonths ? "" : " " + daySettings[1] + // highlight custom dates
1781							(printDate.getTime() === currentDate.getTime() ? " " + this._currentClass : "") + // highlight selected day
1782							(printDate.getTime() === today.getTime() ? " ui-datepicker-today" : "")) + "'" + // highlight today (if different)
1783							((!otherMonth || showOtherMonths) && daySettings[2] ? " title='" + daySettings[2].replace(/'/g, "&#39;") + "'" : "") + // cell title
1784							(unselectable ? "" : " data-handler='selectDay' data-event='click' data-month='" + printDate.getMonth() + "' data-year='" + printDate.getFullYear() + "'") + ">" + // actions
1785							(otherMonth && !showOtherMonths ? "&#xa0;" : // display for other months
1786							(unselectable ? "<span class='ui-state-default'>" + printDate.getDate() + "</span>" : "<a class='ui-state-default" +
1787							(printDate.getTime() === today.getTime() ? " ui-state-highlight" : "") +
1788							(printDate.getTime() === currentDate.getTime() ? " ui-state-active" : "") + // highlight selected day
1789							(otherMonth ? " ui-priority-secondary" : "") + // distinguish dates from other months
1790							"' href='#'>" + printDate.getDate() + "</a>")) + "</td>"; // display selectable date
1791						printDate.setDate(printDate.getDate() + 1);
1792						printDate = this._daylightSavingAdjust(printDate);
1793					}
1794					calender += tbody + "</tr>";
1795				}
1796				drawMonth++;
1797				if (drawMonth > 11) {
1798					drawMonth = 0;
1799					drawYear++;
1800				}
1801				calender += "</tbody></table>" + (isMultiMonth ? "</div>" +
1802							((numMonths[0] > 0 && col === numMonths[1]-1) ? "<div class='ui-datepicker-row-break'></div>" : "") : "");
1803				group += calender;
1804			}
1805			html += group;
1806		}
1807		html += buttonPanel;
1808		inst._keyEvent = false;
1809		return html;
1810	},
1811
1812	/* Generate the month and year header. */
1813	_generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,
1814			secondary, monthNames, monthNamesShort) {
1815
1816		var inMinYear, inMaxYear, month, years, thisYear, determineYear, year, endYear,
1817			changeMonth = this._get(inst, "changeMonth"),
1818			changeYear = this._get(inst, "changeYear"),
1819			showMonthAfterYear = this._get(inst, "showMonthAfterYear"),
1820			html = "<div class='ui-datepicker-title'>",
1821			monthHtml = "";
1822
1823		// month selection
1824		if (secondary || !changeMonth) {
1825			monthHtml += "<span class='ui-datepicker-month'>" + monthNames[drawMonth] + "</span>";
1826		} else {
1827			inMinYear = (minDate && minDate.getFullYear() === drawYear);
1828			inMaxYear = (maxDate && maxDate.getFullYear() === drawYear);
1829			monthHtml += "<select class='ui-datepicker-month' data-handler='selectMonth' data-event='change'>";
1830			for ( month = 0; month < 12; month++) {
1831				if ((!inMinYear || month >= minDate.getMonth()) && (!inMaxYear || month <= maxDate.getMonth())) {
1832					monthHtml += "<option value='" + month + "'" +
1833						(month === drawMonth ? " selected='selected'" : "") +
1834						">" + monthNamesShort[month] + "</option>";
1835				}
1836			}
1837			monthHtml += "</select>";
1838		}
1839
1840		if (!showMonthAfterYear) {
1841			html += monthHtml + (secondary || !(changeMonth && changeYear) ? "&#xa0;" : "");
1842		}
1843
1844		// year selection
1845		if ( !inst.yearshtml ) {
1846			inst.yearshtml = "";
1847			if (secondary || !changeYear) {
1848				html += "<span class='ui-datepicker-year'>" + drawYear + "</span>";
1849			} else {
1850				// determine range of years to display
1851				years = this._get(inst, "yearRange").split(":");
1852				thisYear = new Date().getFullYear();
1853				determineYear = function(value) {
1854					var year = (value.match(/c[+\-].*/) ? drawYear + parseInt(value.substring(1), 10) :
1855						(value.match(/[+\-].*/) ? thisYear + parseInt(value, 10) :
1856						parseInt(value, 10)));
1857					return (isNaN(year) ? thisYear : year);
1858				};
1859				year = determineYear(years[0]);
1860				endYear = Math.max(year, determineYear(years[1] || ""));
1861				year = (minDate ? Math.max(year, minDate.getFullYear()) : year);
1862				endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);
1863				inst.yearshtml += "<select class='ui-datepicker-year' data-handler='selectYear' data-event='change'>";
1864				for (; year <= endYear; year++) {
1865					inst.yearshtml += "<option value='" + year + "'" +
1866						(year === drawYear ? " selected='selected'" : "") +
1867						">" + year + "</option>";
1868				}
1869				inst.yearshtml += "</select>";
1870
1871				html += inst.yearshtml;
1872				inst.yearshtml = null;
1873			}
1874		}
1875
1876		html += this._get(inst, "yearSuffix");
1877		if (showMonthAfterYear) {
1878			html += (secondary || !(changeMonth && changeYear) ? "&#xa0;" : "") + monthHtml;
1879		}
1880		html += "</div>"; // Close datepicker_header
1881		return html;
1882	},
1883
1884	/* Adjust one of the date sub-fields. */
1885	_adjustInstDate: function(inst, offset, period) {
1886		var year = inst.drawYear + (period === "Y" ? offset : 0),
1887			month = inst.drawMonth + (period === "M" ? offset : 0),
1888			day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) + (period === "D" ? offset : 0),
1889			date = this._restrictMinMax(inst, this._daylightSavingAdjust(new Date(year, month, day)));
1890
1891		inst.selectedDay = date.getDate();
1892		inst.drawMonth = inst.selectedMonth = date.getMonth();
1893		inst.drawYear = inst.selectedYear = date.getFullYear();
1894		if (period === "M" || period === "Y") {
1895			this._notifyChange(inst);
1896		}
1897	},
1898
1899	/* Ensure a date is within any min/max bounds. */
1900	_restrictMinMax: function(inst, date) {
1901		var minDate = this._getMinMaxDate(inst, "min"),
1902			maxDate = this._getMinMaxDate(inst, "max"),
1903			newDate = (minDate && date < minDate ? minDate : date);
1904		return (maxDate && newDate > maxDate ? maxDate : newDate);
1905	},
1906
1907	/* Notify change of month/year. */
1908	_notifyChange: function(inst) {
1909		var onChange = this._get(inst, "onChangeMonthYear");
1910		if (onChange) {
1911			onChange.apply((inst.input ? inst.input[0] : null),
1912				[inst.selectedYear, inst.selectedMonth + 1, inst]);
1913		}
1914	},
1915
1916	/* Determine the number of months to show. */
1917	_getNumberOfMonths: function(inst) {
1918		var numMonths = this._get(inst, "numberOfMonths");
1919		return (numMonths == null ? [1, 1] : (typeof numMonths === "number" ? [1, numMonths] : numMonths));
1920	},
1921
1922	/* Determine the current maximum date - ensure no time components are set. */
1923	_getMinMaxDate: function(inst, minMax) {
1924		return this._determineDate(inst, this._get(inst, minMax + "Date"), null);
1925	},
1926
1927	/* Find the number of days in a given month. */
1928	_getDaysInMonth: function(year, month) {
1929		return 32 - this._daylightSavingAdjust(new Date(year, month, 32)).getDate();
1930	},
1931
1932	/* Find the day of the week of the first of a month. */
1933	_getFirstDayOfMonth: function(year, month) {
1934		return new Date(year, month, 1).getDay();
1935	},
1936
1937	/* Determines if we should allow a "next/prev" month display change. */
1938	_canAdjustMonth: function(inst, offset, curYear, curMonth) {
1939		var numMonths = this._getNumberOfMonths(inst),
1940			date = this._daylightSavingAdjust(new Date(curYear,
1941			curMonth + (offset < 0 ? offset : numMonths[0] * numMonths[1]), 1));
1942
1943		if (offset < 0) {
1944			date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
1945		}
1946		return this._isInRange(inst, date);
1947	},
1948
1949	/* Is the given date in the accepted range? */
1950	_isInRange: function(inst, date) {
1951		var yearSplit, currentYear,
1952			minDate = this._getMinMaxDate(inst, "min"),
1953			maxDate = this._getMinMaxDate(inst, "max"),
1954			minYear = null,
1955			maxYear = null,
1956			years = this._get(inst, "yearRange");
1957			if (years){
1958				yearSplit = years.split(":");
1959				currentYear = new Date().getFullYear();
1960				minYear = parseInt(yearSplit[0], 10);
1961				maxYear = parseInt(yearSplit[1], 10);
1962				if ( yearSplit[0].match(/[+\-].*/) ) {
1963					minYear += currentYear;
1964				}
1965				if ( yearSplit[1].match(/[+\-].*/) ) {
1966					maxYear += currentYear;
1967				}
1968			}
1969
1970		return ((!minDate || date.getTime() >= minDate.getTime()) &&
1971			(!maxDate || date.getTime() <= maxDate.getTime()) &&
1972			(!minYear || date.getFullYear() >= minYear) &&
1973			(!maxYear || date.getFullYear() <= maxYear));
1974	},
1975
1976	/* Provide the configuration settings for formatting/parsing. */
1977	_getFormatConfig: function(inst) {
1978		var shortYearCutoff = this._get(inst, "shortYearCutoff");
1979		shortYearCutoff = (typeof shortYearCutoff !== "string" ? shortYearCutoff :
1980			new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
1981		return {shortYearCutoff: shortYearCutoff,
1982			dayNamesShort: this._get(inst, "dayNamesShort"), dayNames: this._get(inst, "dayNames"),
1983			monthNamesShort: this._get(inst, "monthNamesShort"), monthNames: this._get(inst, "monthNames")};
1984	},
1985
1986	/* Format the given date for display. */
1987	_formatDate: function(inst, day, month, year) {
1988		if (!day) {
1989			inst.currentDay = inst.selectedDay;
1990			inst.currentMonth = inst.selectedMonth;
1991			inst.currentYear = inst.selectedYear;
1992		}
1993		var date = (day ? (typeof day === "object" ? day :
1994			this._daylightSavingAdjust(new Date(year, month, day))) :
1995			this._daylightSavingAdjust(new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
1996		return this.formatDate(this._get(inst, "dateFormat"), date, this._getFormatConfig(inst));
1997	}
1998});
1999
2000/*
2001 * Bind hover events for datepicker elements.
2002 * Done via delegate so the binding only occurs once in the lifetime of the parent div.
2003 * Global datepicker_instActive, set by _updateDatepicker allows the handlers to find their way back to the active picker.
2004 */
2005function datepicker_bindHover(dpDiv) {
2006	var selector = "button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a";
2007	return dpDiv.delegate(selector, "mouseout", function() {
2008			$(this).removeClass("ui-state-hover");
2009			if (this.className.indexOf("ui-datepicker-prev") !== -1) {
2010				$(this).removeClass("ui-datepicker-prev-hover");
2011			}
2012			if (this.className.indexOf("ui-datepicker-next") !== -1) {
2013				$(this).removeClass("ui-datepicker-next-hover");
2014			}
2015		})
2016		.delegate( selector, "mouseover", datepicker_handleMouseover );
2017}
2018
2019function datepicker_handleMouseover() {
2020	if (!$.datepicker._isDisabledDatepicker( datepicker_instActive.inline? datepicker_instActive.dpDiv.parent()[0] : datepicker_instActive.input[0])) {
2021		$(this).parents(".ui-datepicker-calendar").find("a").removeClass("ui-state-hover");
2022		$(this).addClass("ui-state-hover");
2023		if (this.className.indexOf("ui-datepicker-prev") !== -1) {
2024			$(this).addClass("ui-datepicker-prev-hover");
2025		}
2026		if (this.className.indexOf("ui-datepicker-next") !== -1) {
2027			$(this).addClass("ui-datepicker-next-hover");
2028		}
2029	}
2030}
2031
2032/* jQuery extend now ignores nulls! */
2033function datepicker_extendRemove(target, props) {
2034	$.extend(target, props);
2035	for (var name in props) {
2036		if (props[name] == null) {
2037			target[name] = props[name];
2038		}
2039	}
2040	return target;
2041}
2042
2043/* Invoke the datepicker functionality.
2044   @param  options  string - a command, optionally followed by additional parameters or
2045					Object - settings for attaching new datepicker functionality
2046   @return  jQuery object */
2047$.fn.datepicker = function(options){
2048
2049	/* Verify an empty collection wasn't passed - Fixes #6976 */
2050	if ( !this.length ) {
2051		return this;
2052	}
2053
2054	/* Initialise the date picker. */
2055	if (!$.datepicker.initialized) {
2056		$(document).mousedown($.datepicker._checkExternalClick);
2057		$.datepicker.initialized = true;
2058	}
2059
2060	/* Append datepicker main container to body if not exist. */
2061	if ($("#"+$.datepicker._mainDivId).length === 0) {
2062		$("body").append($.datepicker.dpDiv);
2063	}
2064
2065	var otherArgs = Array.prototype.slice.call(arguments, 1);
2066	if (typeof options === "string" && (options === "isDisabled" || options === "getDate" || options === "widget")) {
2067		return $.datepicker["_" + options + "Datepicker"].
2068			apply($.datepicker, [this[0]].concat(otherArgs));
2069	}
2070	if (options === "option" && arguments.length === 2 && typeof arguments[1] === "string") {
2071		return $.datepicker["_" + options + "Datepicker"].
2072			apply($.datepicker, [this[0]].concat(otherArgs));
2073	}
2074	return this.each(function() {
2075		typeof options === "string" ?
2076			$.datepicker["_" + options + "Datepicker"].
2077				apply($.datepicker, [this].concat(otherArgs)) :
2078			$.datepicker._attachDatepicker(this, options);
2079	});
2080};
2081
2082$.datepicker = new Datepicker(); // singleton instance
2083$.datepicker.initialized = false;
2084$.datepicker.uuid = new Date().getTime();
2085$.datepicker.version = "1.11.4";
2086