/* jQuery UI Date Picker v3.4.3 (previously jQuery Calendar)

   Written by Marc Grabanski (m@marcgrabanski.com) and Keith Wood (kbwood@virginbroadband.com.au).

   Copyright (c) 2007 Marc Grabanski (http://marcgrabanski.com/code/ui-datetimepicker)

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

   and GPL (GPL-LICENSE.txt) licenses.

   Date: 09-03-2007  */

/*

 * Time functionality added by Stanislav Dobry (stanislav.dobry@datesoft.cz)

 * Date: 2008-06-04

 */

/*

 * Patched by Haoyu Bai (baihaoyu@gmail.com) for date-picker only mode,

 * and better behavior. (Sync Year/Month select with input box)

 */

;(function($) { // hide the namespace

/* Date picker manager.

   Use the singleton instance of this class, $.datetimepicker, to interact with the date picker.

   Settings for (groups of) date pickers are maintained in an instance object

   (DatepickerInstance), allowing multiple different settings on the same page. */

function DateTimepicker() {

	this.debug = false; // Change this to true to start debugging

	this._nextId = 0; // Next ID for a date picker instance

	this._inst = []; // List of instances indexed by ID

	this._curInst = null; // The current instance in use

	this._disabledInputs = []; // List of date picker inputs that have been disabled

	this._datetimepickerShowing = false; // True if the popup picker is showing , false if not

	this._inDialog = false; // True if showing within a "dialog", false if not

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

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

		clearText: 'Clear', // Display text for clear link

		clearStatus: 'Erase the current date', // Status text for clear link

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

		closeStatus: 'Close without change', // Status text for close link

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

		prevStatus: 'Show the previous month', // Status text for previous month link

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

		nextStatus: 'Show the next month', // Status text for next month link

		currentText: 'Today', // Display text for current month link

		currentStatus: 'Show the current month', // Status text for current month link

		monthNames: ['January','February','March','April','May','June',

			'July','August','September','October','November','December'], // Names of months for drop-down and formatting

		monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], // For formatting

		monthStatus: 'Show a different month', // Status text for selecting a month

		yearStatus: 'Show a different year', // Status text for selecting a year

		weekHeader: 'Wk', // Header for the week of the year column

		weekStatus: 'Week of the year', // Status text for the week of the year column

		dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'], // For formatting

		dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'], // For formatting

		dayNamesMin: ['Su','Mo','Tu','We','Th','Fr','Sa'], // Column headings for days starting at Sunday

		dayStatus: 'Set DD as first week day', // Status text for the day of the week selection

		dateStatus: 'Select DD, M d', // Status text for the date selection

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

		timeFormat: 'hh:ii',

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

		initStatus: 'Select a date', // Initial Status text on opening

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

	};

	this._defaults = { // Global defaults for all the date picker instances

        pickDateOnly: false, // If true, work as datepicker, no time-picker

		showOn: 'focus', // 'focus' for popup on focus,

			// 'button' for trigger button, or 'both' for either

		showAnim: 'show', // Name of jQuery animation for popup

		defaultDate: null, // Used when field is blank: actual date,

			// +/-number for offset from today, null for today

		appendText: '', // Display text following the input box, e.g. showing the format

		buttonText: '...', // Text for trigger button

		buttonImage: '', // URL for trigger button image

		buttonImageOnly: false, // True if the image appears alone, false if it appears on a button

		closeAtTop: true, // True to have the clear/close at the top,

			// false to have them at the bottom

		mandatory: false, // True to hide the Clear link, false to include it

		hideIfNoPrevNext: false, // True to hide next/previous month links

			// if not applicable, false to just disable them

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

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

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

			// either relative to current year (-nn:+nn) or absolute (nnnn:nnnn)

		changeFirstDay: true, // True to click on day name to change, false to remain as set

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

		showWeeks: false, // True to show week of the year, false to omit

		calculateWeek: this.iso8601Week, // How to calculate the week of the year,

			// takes a Date and returns the number of the week for it

		shortYearCutoff: '+10', // Short year values < this are in the current century,

			// > this are in the previous century,

			// string value starting with '+' for current year + value

		showStatus: false, // True to show status bar at bottom, false to not show it

		statusForDate: this.dateStatus, // Function to provide status text for a date -

			// takes date and instance as parameters, returns display text

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

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

		speed: 'normal', // Speed 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 '', e.g. $.datetimepicker.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

		onClose: null, // Define a callback function when the datetimepicker is closed

		numberOfMonths: 1, // Number of months to show at a time

		stepMonths: 1, // Number of months to step back/forward

		rangeSelect: false, // Allows for selecting a date range on one date picker

		rangeSeparator: ' - ' // Text between two dates in a range

	};

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

	this._datetimepickerDiv = $('<div id="datetimepicker_div"></div>');

}

$.extend(DateTimepicker.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);

	},

	/* Register a new date picker instance - with custom settings. */

	_register: function(inst) {

		var id = this._nextId++;

		this._inst[id] = inst;

		return id;

	},

	/* Retrieve a particular date picker instance based on its ID. */

	_getInst: function(id) {

		return this._inst[id] || id;

	},

	/* Override the default settings for all instances of the date picker.

	   @param  settings  object - the new settings to use as defaults (anonymous object)

	   @return the manager object */

	setDefaults: function(settings) {

		extendRemove(this._defaults, settings || {});

		return this;

	},

	/* Attach the date picker to a jQuery selection.

	   @param  target    element - the target input field or division or span

	   @param  settings  object - the new settings to use for this date picker instance (anonymous) */

	_attachDatepicker: function(target, settings) {

		// check for settings on the control itself - in namespace 'date:'

		var inlineSettings = null;

		for (attrName in this._defaults) {

			var attrValue = target.getAttribute('date:' + attrName);

			if (attrValue) {

				inlineSettings = inlineSettings || {};

				try {

					inlineSettings[attrName] = eval(attrValue);

				} catch (err) {

					inlineSettings[attrName] = attrValue;

				}

			}

		}

		var nodeName = target.nodeName.toLowerCase();

		var instSettings = (inlineSettings ?

			$.extend(settings || {}, inlineSettings || {}) : settings);

		if (nodeName == 'input') {

			var inst = (inst && !inlineSettings ? inst :

				new DateTimepickerInstance(instSettings, false));

			this._connectDatepicker(target, inst);

		} else if (nodeName == 'div' || nodeName == 'span') {

			var inst = new DateTimepickerInstance(instSettings, true);

			this._inlineDatepicker(target, inst);

		}

	},

	/* Detach a datetimepicker from its control.

	   @param  target    element - the target input field or division or span */

	_destroyDatepicker: function(target) {

		var nodeName = target.nodeName.toLowerCase();

		var calId = target._calId;

		target._calId = null;

		var $target = $(target);

		if (nodeName == 'input') {

			$target.siblings('.datetimepicker_append').replaceWith('').end()

				.siblings('.datetimepicker_trigger').replaceWith('').end()

				.removeClass(this.markerClassName)

				.unbind('focus', this._showDatepicker)

				.unbind('keydown', this._doKeyDown)

				.unbind('keypress', this._doKeyPress);

			var wrapper = $target.parents('.datetimepicker_wrap');

			if (wrapper)

				wrapper.replaceWith(wrapper.html());

		} else if (nodeName == 'div' || nodeName == 'span')

			$target.removeClass(this.markerClassName).empty();

		if ($('input[_calId=' + calId + ']').length == 0)

			// clean up if last for this ID

			this._inst[calId] = null;

	},

	/* Enable the date picker to a jQuery selection.

	   @param  target    element - the target input field or division or span */

	_enableDatepicker: function(target) {

		target.disabled = false;

		$(target).siblings('button.datetimepicker_trigger').each(function() { this.disabled = false; }).end()

			.siblings('img.datetimepicker_trigger').css({opacity: '1.0', cursor: ''});

		this._disabledInputs = $.map(this._disabledInputs,

			function(value) { return (value == target ? null : value); }); // delete entry

	},

	/* Disable the date picker to a jQuery selection.

	   @param  target    element - the target input field or division or span */

	_disableDatepicker: function(target) {

		target.disabled = true;

		$(target).siblings('button.datetimepicker_trigger').each(function() { this.disabled = true; }).end()

			.siblings('img.datetimepicker_trigger').css({opacity: '0.5', cursor: 'default'});

		this._disabledInputs = $.map($.datetimepicker._disabledInputs,

			function(value) { return (value == target ? null : value); }); // delete entry

		this._disabledInputs[$.datetimepicker._disabledInputs.length] = target;

	},

	/* Is the first field in a jQuery collection disabled as a datetimepicker?

	   @param  target    element - the target input field or division or span

	   @return boolean - true if disabled, false if enabled */

	_isDisabledDatepicker: function(target) {

		if (!target)

			return false;

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

			if (this._disabledInputs[i] == target)

				return true;

		}

		return false;

	},

	/* Update the settings for a date picker attached to an input field or division.

	   @param  target  element - the target input field or division or span

	   @param  name    string - the name of the setting to change or

	                   object - the new settings to update

	   @param  value   any - the new value for the setting (omit if above is an object) */

	_changeDatepicker: function(target, name, value) {

		var settings = name || {};

		if (typeof name == 'string') {

			settings = {};

			settings[name] = value;

		}

		if (inst = this._getInst(target._calId)) {

			extendRemove(inst._settings, settings);

			this._updateDatepicker(inst);

		}

	},

	/* Set the dates for a jQuery selection.

	   @param  target   element - the target input field or division or span

	   @param  date     Date - the new date

	   @param  endDate  Date - the new end date for a range (optional) */

	_setDateDatepicker: function(target, date, endDate) {

		if (inst = this._getInst(target._calId)) {

			inst._setDate(date, endDate);

			this._updateDatepicker(inst);

		}

	},

	/* Get the date(s) for the first entry in a jQuery selection.

	   @param  target  element - the target input field or division or span

	   @return Date - the current date or

	           Date[2] - the current dates for a range */

	_getDateDatepicker: function(target) {

		var inst = this._getInst(target._calId);

		return (inst ? inst._getDate() : null);

	},

	/* Handle keystrokes. */

	_doKeyDown: function(e) {

		var inst = $.datetimepicker._getInst(this._calId);

		if ($.datetimepicker._datetimepickerShowing)

			switch (e.keyCode) {

				case 9:  $.datetimepicker._hideDatepicker(null, '');

						break; // hide on tab out

				case 13: $.datetimepicker._selectDay(inst, inst._selectedMonth, inst._selectedYear,

							$('td.datetimepicker_daysCellOver', inst._datetimepickerDiv)[0]);

						return false; // don't submit the form

						break; // select the value on enter

				case 27: $.datetimepicker._hideDatepicker(null, inst._get('speed'));

						break; // hide on escape

				case 33: $.datetimepicker._adjustDate(inst,

							(e.ctrlKey ? -1 : -inst._get('stepMonths')), (e.ctrlKey ? 'Y' : 'M'));

						break; // previous month/year on page up/+ ctrl

				case 34: $.datetimepicker._adjustDate(inst,

							(e.ctrlKey ? +1 : +inst._get('stepMonths')), (e.ctrlKey ? 'Y' : 'M'));

						break; // next month/year on page down/+ ctrl

				case 35: if (e.ctrlKey) $.datetimepicker._clearDate(inst);

						break; // clear on ctrl+end

				case 36: if (e.ctrlKey) $.datetimepicker._gotoToday(inst);

						break; // current on ctrl+home

				case 37: if (e.ctrlKey) $.datetimepicker._adjustDate(inst, -1, 'D');

						break; // -1 day on ctrl+left

				case 38: if (e.ctrlKey) $.datetimepicker._adjustDate(inst, -7, 'D');

						break; // -1 week on ctrl+up

				case 39: if (e.ctrlKey) $.datetimepicker._adjustDate(inst, +1, 'D');

						break; // +1 day on ctrl+right

				case 40: if (e.ctrlKey) $.datetimepicker._adjustDate(inst, +7, 'D');

						break; // +1 week on ctrl+down

			}

		else if (e.keyCode == 36 && e.ctrlKey) // display the date picker on ctrl+home

			$.datetimepicker._showDatepicker(this);

	},

	/* Filter entered characters - based on date format. */

	_doKeyPress: function(e) {

		var inst = $.datetimepicker._getInst(this._calId);

		var chars = $.datetimepicker._possibleChars(inst._get('dateFormat')+' '+inst._get('timeFormat'));

		var chr = String.fromCharCode(e.charCode == undefined ? e.keyCode : e.charCode);

		return e.ctrlKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);

	},

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

	_connectDatepicker: function(target, inst) {

		var input = $(target);

		if (input.is('.' + this.markerClassName))

			return;

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

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

		if (appendText) {

			if (isRTL)

				input.before('<span class="datetimepicker_append">' + appendText);

			else

				input.after('<span class="datetimepicker_append">' + appendText);

		}

		var showOn = inst._get('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

			input.wrap('<span class="datetimepicker_wrap">');

			var buttonText = inst._get('buttonText');

			var buttonImage = inst._get('buttonImage');

			var trigger = $(inst._get('buttonImageOnly') ?

				$('<img>').addClass('datetimepicker_trigger').attr({ src: buttonImage, alt: buttonText, title: buttonText }) :

				$('<button>').addClass('datetimepicker_trigger').attr({ type: 'button' }).html(buttonImage != '' ?

						$('<img>').attr({ src:buttonImage, alt:buttonText, title:buttonText }) : buttonText));

			if (isRTL)

				input.before(trigger);

			else

				input.after(trigger);

			trigger.click(function() {

				if ($.datetimepicker._datetimepickerShowing && $.datetimepicker._lastInput == target)

					$.datetimepicker._hideDatepicker();

				else

					$.datetimepicker._showDatepicker(target);

			});

        }

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

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

				inst._settings[key] = value;

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

				return inst._get(key);

			});

		input[0]._calId = inst._id;

	},

	/* Attach an inline date picker to a div. */

	_inlineDatepicker: function(target, inst) {

		var input = $(target);

		if (input.is('.' + this.markerClassName))

			return;

		input.addClass(this.markerClassName).append(inst._datetimepickerDiv)

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

				inst._settings[key] = value;

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

				return inst._get(key);

			});

		input[0]._calId = inst._id;

		this._updateDatepicker(inst);

	},

	/* Tidy up after displaying the date picker. */

	_inlineShow: function(inst) {

		var numMonths = inst._getNumberOfMonths(); // fix width for dynamic number of date pickers

		inst._datetimepickerDiv.width(numMonths[1] * $('.datetimepicker', inst._datetimepickerDiv[0]).width());

	},

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

	   @param  input     element - ignored

	   @param  dateText  string - the initial date to display (in the current format)

	   @param  onSelect  function - the function(dateText) to call when a date is selected

	   @param  settings  object - update the dialog date picker instance's settings (anonymous object)

	   @param  pos       int[2] - coordinates for the dialog's position within the screen or

	                     event - with x/y coordinates or

	                     leave empty for default (screen centre)

	   @return the manager object */

	_dialogDatepicker: function(input, dateText, onSelect, settings, pos) {

		var inst = this._dialogInst; // internal instance

		if (!inst) {

			inst = this._dialogInst = new DateTimepickerInstance({}, false);

			this._dialogInput = $('<input type="text" size="1" style="position: absolute; top: -100px;"/>');

			this._dialogInput.keydown(this._doKeyDown);

			$('body').append(this._dialogInput);

			this._dialogInput[0]._calId = inst._id;

		}

		extendRemove(inst._settings, settings || {});

		this._dialogInput.val(dateText);

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

		if (!this._pos) {

			var browserWidth = window.innerWidth || document.documentElement.clientWidth ||	document.body.clientWidth;

			var browserHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;

			var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;

			var scrollY = document.documentElement.scrollTop || document.body.scrollTop;

			this._pos = // should use actual width/height below

				[(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];

		}

		// move input on screen for focus, but hidden behind dialog

		this._dialogInput.css('left', this._pos[0] + 'px').css('top', this._pos[1] + 'px');

		inst._settings.onSelect = onSelect;

		this._inDialog = true;

		this._datetimepickerDiv.addClass('datetimepicker_dialog');

		this._showDatepicker(this._dialogInput[0]);

		if ($.blockUI)

			$.blockUI(this._datetimepickerDiv);

		return this;

	},

	/* Pop-up the date picker for a given input field.

	   @param  input  element - the input field attached to the date picker or

	                  event - if triggered by focus */

	_showDatepicker: function(input) {

		input = input.target || input;

		if (input.nodeName.toLowerCase() != 'input') // find from button/image trigger

			input = $('input', input.parentNode)[0];

		if ($.datetimepicker._isDisabledDatepicker(input) || $.datetimepicker._lastInput == input) // already here

			return;

		var inst = $.datetimepicker._getInst(input._calId);

		var beforeShow = inst._get('beforeShow');

		extendRemove(inst._settings, (beforeShow ? beforeShow.apply(input, [input, inst]) : {}));

		$.datetimepicker._hideDatepicker(null, '');

		$.datetimepicker._lastInput = input;

		inst._setDateFromField(input);

		if ($.datetimepicker._inDialog) // hide cursor

			input.value = '';

		if (!$.datetimepicker._pos) { // position below input

			$.datetimepicker._pos = $.datetimepicker._findPos(input);

			$.datetimepicker._pos[1] += input.offsetHeight; // add the height

		}

		var isFixed = false;

		$(input).parents().each(function() {

			isFixed |= $(this).css('position') == 'fixed';

		});

		if (isFixed && $.browser.opera) { // correction for Opera when fixed and scrolled

			$.datetimepicker._pos[0] -= document.documentElement.scrollLeft;

			$.datetimepicker._pos[1] -= document.documentElement.scrollTop;

		}

		inst._datetimepickerDiv.css('position', ($.datetimepicker._inDialog && $.blockUI ?

			'static' : (isFixed ? 'fixed' : 'absolute')))

			.css({ left: $.datetimepicker._pos[0] + 'px', top: $.datetimepicker._pos[1] + 'px' });

		$.datetimepicker._pos = null;

		inst._rangeStart = null;

		$.datetimepicker._updateDatepicker(inst);

		if (!inst._inline) {

			var speed = inst._get('speed');

			var postProcess = function() {

				$.datetimepicker._datetimepickerShowing = true;

				$.datetimepicker._afterShow(inst);

			};

			var showAnim = inst._get('showAnim') || 'show';

			inst._datetimepickerDiv[showAnim](speed, postProcess);

			if (speed == '')

				postProcess();

			if (inst._input[0].type != 'hidden')

				inst._input[0].focus();

			$.datetimepicker._curInst = inst;

		}

	},

	/* Generate the date picker content. */

	_updateDatepicker: function(inst) {

		inst._datetimepickerDiv.empty().append(inst._generateDatepicker());

		var numMonths = inst._getNumberOfMonths();

		if (numMonths[0] != 1 || numMonths[1] != 1)

			inst._datetimepickerDiv.addClass('datetimepicker_multi');

		else

			inst._datetimepickerDiv.removeClass('datetimepicker_multi');

		if (inst._get('isRTL'))

			inst._datetimepickerDiv.addClass('datetimepicker_rtl');

		else

			inst._datetimepickerDiv.removeClass('datetimepicker_rtl');

		if (inst._input && inst._input[0].type != 'hidden')

			$(inst._input[0]).focus();

	},

	/* Tidy up after displaying the date picker. */

	_afterShow: function(inst) {

		var numMonths = inst._getNumberOfMonths(); // fix width for dynamic number of date pickers

		inst._datetimepickerDiv.width(numMonths[1] * $('.datetimepicker', inst._datetimepickerDiv[0])[0].offsetWidth);

		if ($.browser.msie && parseInt($.browser.version) < 7) { // fix IE < 7 select problems

			$('iframe.datetimepicker_cover').css({width: inst._datetimepickerDiv.width() + 4,

				height: inst._datetimepickerDiv.height() + 4});

		}

		// re-position on screen if necessary