/*

 * jQuery UI Datepicker 1.8.1

 *

 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://docs.jquery.com/UI/Datepicker

 *

 * Depends:

 *	jquery.ui.core.js

 */

(function($) { // hide the namespace

$.extend($.ui, { datepicker: { version: "1.8.1" } });

var PROP_NAME = 'datepicker';

var dpuuid = new Date().getTime();

/* 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._keyEvent = false; // If the last event was a key event

	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._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._dayOverClass = 'ui-datepicker-days-cell-over'; // The name of the day hover marker class

	this.regional = []; // Available regional settings, indexed by language code

	this.regional[''] = { // Default regional settings

		closeText: 'Done', // Display text for close link

		prevText: 'Prev', // Display text for previous month link

		nextText: 'Next', // Display text for next month link

		currentText: 'Today', // Display 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

		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

		weekHeader: 'Wk', // Column header for week of the year

		dateFormat: 'mm/dd/yy', // See format options on parseDate

		firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...

		isRTL: false, // True if right-to-left language, false if left-to-right

		showMonthAfterYear: false, // True if the year select precedes month, false for month then year

		yearSuffix: '' // Additional text to append to the year in the month headers

	};

	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

		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

		gotoCurrent: false, // True if today link goes back to current selection instead

		changeMonth: false, // True if month can be selected directly, false if only prev/next

		changeYear: false, // True if year can be selected directly, false if only prev/next

		yearRange: 'c-10:c+10', // Range of years to display in drop-down,

			// either relative to today's year (-nn:+nn), relative to currently displayed year

			// (c-nn:c+nn), absolute (nnnn:nnnn), or a combination of the above (nnnn:-n)

		showOtherMonths: false, // True to show dates in other months, false to leave blank

		selectOtherMonths: false, // True to allow selection of dates in other months, false for unselectable

		showWeek: false, // True to show week of the year, false to not show it

		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

		minDate: null, // The earliest selectable date, or null for no limit

		maxDate: null, // The latest selectable date, or null for no limit

		duration: '_default', // 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

		altField: '', // Selector for an alternate field to store selected dates into

		altFormat: '', // The date format to use for the alternate field

		constrainInput: true, // The input is constrained by the current date format

		showButtonPanel: false, // True to show button panel, false to not show it

		autoSize: false // True to size the input for the date format, false to leave as is

	};

	$.extend(this._defaults, this.regional['']);

	this.dpDiv = $('<div id="' + this._mainDivId + '" class="ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all ui-helper-hidden-accessible"></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);

	},

	// TODO rename to "widget" when switching to widget factory

	_widgetDatepicker: function() {

		return this.dpDiv;

	},

	/* 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 (var 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(/([^A-Za-z0-9_])/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 + ' ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all"></div>'))};

	},

	/* Attach the date picker to an input field. */

	_connectDatepicker: function(target, inst) {

		var input = $(target);

		inst.append = $([]);

		inst.trigger = $([]);

		if (input.hasClass(this.markerClassName))

			return;

		this._attachments(input, inst);

		input.addClass(this.markerClassName).keydown(this._doKeyDown).

			keypress(this._doKeyPress).keyup(this._doKeyUp).

			bind("setData.datepicker", function(event, key, value) {

				inst.settings[key] = value;

			}).bind("getData.datepicker", function(event, key) {

				return this._get(inst, key);

			});

		this._autoSize(inst);

		$.data(target, PROP_NAME, inst);

	},

	/* Make attachments based on settings. */

	_attachments: function(input, inst) {

		var appendText = this._get(inst, 'appendText');

		var isRTL = this._get(inst, 'isRTL');

		if (inst.append)

			inst.append.remove();

		if (appendText) {

			inst.append = $('<span class="' + this._appendClass + '">' + appendText + '</span>');

			input[isRTL ? 'before' : 'after'](inst.append);

		}

		input.unbind('focus', this._showDatepicker);

		if (inst.trigger)

			inst.trigger.remove();

		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');

			inst.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'](inst.trigger);

			inst.trigger.click(function() {

				if ($.datepicker._datepickerShowing && $.datepicker._lastInput == input[0])

					$.datepicker._hideDatepicker();

				else

					$.datepicker._showDatepicker(input[0]);

				return false;

			});

		}

	},

	/* Apply the maximum length for the date format. */

	_autoSize: function(inst) {

		if (this._get(inst, 'autoSize') && !inst.inline) {

			var date = new Date(2009, 12 - 1, 20); // Ensure double digits

			var dateFormat = this._get(inst, 'dateFormat');

			if (dateFormat.match(/[DM]/)) {

				var findMax = function(names) {

					var max = 0;

					var maxI = 0;

					for (var i = 0; i < names.length; i++) {

						if (names[i].length > max) {

							max = names[i].length;

							maxI = i;

						}

					}

					return maxI;

				};

				date.setMonth(findMax(this._get(inst, (dateFormat.match(/MM/) ?

					'monthNames' : 'monthNamesShort'))));

				date.setDate(findMax(this._get(inst, (dateFormat.match(/DD/) ?

					'dayNames' : 'dayNamesShort'))) + 20 - date.getDay());

			}

			inst.input.attr('size', this._formatDate(inst, date).length);

		}

	},

	/* 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), true);

		this._updateDatepicker(inst);

		this._updateAlternate(inst);

	},

	/* Pop-up the date picker in a "dialog" box.

	   @param  input     element - ignored

	   @param  date      string or Date - the initial date to display

	   @param  onSelect  function - the function 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, date, onSelect, settings, pos) {

		var inst = this._dialogInst; // internal instance

		if (!inst) {

			var id = 'dp' + (++this.uuid);

			this._dialogInput = $('<input type="text" id="' + id +

				'" style="position: absolute; top: -100px; width: 0px; z-index: -10;"/>');

			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 || {});

		date = (date && date.constructor == Date ? this._formatDate(inst, date) : date);

		this._dialogInput.val(date);

		this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);

		if (!this._pos) {

			var browserWidth = document.documentElement.clientWidth;

			var browserHeight = document.documentElement.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] + 20) + '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);

		var inst = $.data(target, PROP_NAME);

		if (!$target.hasClass(this.markerClassName)) {

			return;

		}