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files >> /home/upgov/www/gnvs/js/jquery-calendar.js
 /* MarcGrabanski.com v2.5 */
/* Pop-Up Calendar Built from Scratch by Marc Grabanski */
/* Enhanced by Keith Wood (kbwood@iprimus.com.au). */
/* Time picker functionality added by Gregor Petrin*/
/* Under the Creative Commons Licence http://creativecommons.org/licenses/by/3.0/
	Share or Remix it but please Attribute the authors. */
var popUpCal = {
	selectedDay: 0,
	selectedMonth: 0, // 0-11
	selectedYear: 0, // 4-digit year
	selectedHour:0,
	selectedMinute:0,
	clearText: 'Clear', // Display text for clear link
	closeText: 'Close', // Display text for close link
	prevText: '&lt;Prev', // Display text for previous month link
	nextText: 'Next&gt;', // Display text for next month link
	currentText: 'Today', // Display text for current month link
	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
	dayNames: ['Su','Mo','Tu','We','Th','Fr','Sa'], // Names of days starting at Sunday
	monthNames: ['January','February','March','April','May','June','July','August','September','October','November','December'], // Names of months
	dateFormat: 'DMY/', // First three are day, month, year in the required order, fourth is the separator, e.g. US would be 'MDY/'
	yearRange: '-10:+10', // Range of years to display in drop-down, either relative to current year (-nn:+nn) or absolute (nnnn:nnnn)
	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
	firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
	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
	minDate: null, // The earliest selectable date, or null for no limit
	maxDate: null, // The latest selectable date, or null for no limit
	speed: 'medium', // Speed of display/closure
	autoPopUp: 'focus', // 'focus' for popup on focus, 'button' for trigger button, or 'both' for either
	closeAtTop: true, // True to have the clear/close at the top, false to have them at the bottom
	customDate: 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. popUpCal.noWeekends
	fieldSettings: null, // Function that takes an input field and returns a set of custom settings for the calendar
	timeSeparators:[' ',':','AM','PM'],	//An array of time separators: the first and second strings are obligatory, while the second and third strings specify
		//the AM and PM strings if they are needed; the first parameter separates the date and time fields.
	//timeSeparators:[' ',':'], 	//Enable the time selector without AM/PM
		
	
	/* Format and display the given date. */
	formatDate: function(day, month, year, hour, minute) {
		month++; // adjust javascript month
		var dateString = '';
		for (var i = 0; i < 3; i++) {
			dateString += this.dateFormat.charAt(3) + 
				(this.dateFormat.charAt(i) == 'D' ? (day < 10 ? '0' : '') + day : 
				(this.dateFormat.charAt(i) == 'M' ? (month < 10 ? '0' : '') + month : 
				(this.dateFormat.charAt(i) == 'Y' ? year : '?')));
		}
		
		//append time info
		if (this.timeSeparators && this.timeSeparators.length > 1 && this.timeSeparators[0] && hour != null && minute != null) {
			dateString += this.timeSeparators[0] + this.hourString(hour) + this.timeSeparators[1] + ((minute >= 10) ? minute : ('0' + minute));
			if (this.timeSeparators.length == 4 && hour < 12) dateString += this.timeSeparators[2];
			else if (this.timeSeparators.length == 4 && hour >= 12) dateString += this.timeSeparators[3];
		}
		
		return dateString.substring(1);
	},
	
	/*Parses a string and returns a Date object*/
	parseDate: function(Text) {
		var currentYear, currentMonth, currentDay, currentHour, currentMinute;
	
		if (this.timeSeparators && this.timeSeparators.length > 1) {
			var currentTimeAndDate = Text.split(this.timeSeparators[0]);
			var index = 0;
			while (index < currentTimeAndDate.length) if (currentTimeAndDate[index]) index++; else currentTimeAndDate.splice(index, 1);
			if (currentTimeAndDate.length > 0) var currentDate = currentTimeAndDate[0].split(this.dateFormat.charAt(3)); else var currentDate = [];
			if (currentTimeAndDate.length > 1) var currentTime = currentTimeAndDate[1].split(this.timeSeparators[1]); else var currentTime = [];
		}
		else {
			var currentDate = Text.split(this.dateFormat.charAt(3));
			var currentTime = null;
		}
		
		if (currentDate.length == 3) {
			currentDay = parseInt(currentDate[this.dateFormat.indexOf('D')],10);
			if (isNaN(currentDay)) {currentDay = new Date().getDate(); validDate = false;}
			currentMonth = parseInt(currentDate[this.dateFormat.indexOf('M')],10) - 1;
			if (isNaN(currentMonth)) {currentMonth = new Date().getMonth(); validDate = false;}
			currentYear= parseInt(currentDate[this.dateFormat.indexOf('Y')],10);
			if (isNaN(currentYear)) {currentYear = new Date().getFullYear(); validDate = false;}
		} else {
			currentDay = new Date().getDate();
			currentMonth = new Date().getMonth();
			currentYear= new Date().getFullYear();
			validDate = false;
		}
		
		if (this.timeSeparators && this.timeSeparators.length > 1 && this.timeSeparators[0]) {
			if (currentTime != null && currentTime.length == 2) {
				currentHour = parseInt(currentTime[0],10);
				if (isNaN(currentHour)) {currentHour = new Date().getHours(); validDate = false;}

				if (this.timeSeparators.length > 2) {
						if (currentTime[1].toLowerCase().indexOf(this.timeSeparators[2].toLowerCase()) == currentTime[1].length - this.timeSeparators[2].length) {
						if (currentHour == 12) currentHour = 0;
						currentMinute = parseInt(currentTime[1].substring(0, currentTime[1].length - this.timeSeparators[2].length),10);
					} else if (currentTime[1].toLowerCase().indexOf(this.timeSeparators[3].toLowerCase()) == currentTime[1].length - this.timeSeparators[2].length) {
						if (currentHour < 12) currentHour += 12;
						currentMinute = parseInt(currentTime[1].substring(0, currentTime[1].length - this.timeSeparators[1].length),10);
					}
					else {
						currentMinute = new Date().getMinutes();
						validDate = false;
					}
				}
				else currentMinute = parseInt(currentTime[1],10);
			} else {
				currentHour = new Date().getHours();
				currentMinute = new Date().getMinutes();
				validDate = false;
			}
			if (isNaN(currentMinute)) {currentMinute = new Date().getMinutes(); validDate = false;}
			var returnValue = new Date(currentYear, currentMonth, currentDay, currentHour, currentMinute);
			if (!validDate) returnValue.textInvalid = true;
			return returnValue;
		}
		else {
			if (isNaN(currentMinute)) {currentMinute = new Date().getMinutes(); validDate = false;}
			var returnValue = new Date(currentYear, currentMonth, currentDay);
			if (!validDate) returnValue.textInvalid = true;
			return returnValue;
		}
	},
	
	
	/* Parse existing date and initialise calendar. */
	setDateFromField: function() {
		var currentDate = this.parseDate(this.input.val());
		
		this.currentDay = currentDate.getDate();
		this.currentMonth = currentDate.getMonth();
		this.currentYear = currentDate.getFullYear();
		if (this.timeSeparators && this.timeSeparators.length > 1 && this.timeSeparators[0]) {
			this.currentHour = currentDate.getHours();
			this.currentMinute = currentDate.getMinutes();
		}

		
		this.selectedDay = this.currentDay;
		this.selectedMonth = this.currentMonth;
		this.selectedYear = this.currentYear;
		if (this.currentHour && this.currentMinute) {
			this.selectedHour = this.currentHour;
			this.selectedMinute = this.currentMinute;
		}
		this.adjustDate(0, 'D', true);
	},
	
	/*Translates this hour into the AM/PM number if neccessary*/
	hourString: function(Hour) {
		if (this.timeSeparators.length == 4) {
			if (Hour == 0) return '' + 12;
			else if (Hour > 12) return '' + (Hour - 12);
			else return '' + Hour;
		} 
		else return '' + Hour;
	},
	
	/* Update the input field with the selected date. */
	/* Edited by Gregor Petrin to allow a custom input field as a parameter  - this can be used to display a date at start*/
	selectDate: function(Input) {
		if (!Input) var Input = this.input;
		this.hideCalendar(this.speed);
		if (this.timeSeparators && this.timeSeparators.length > 1) Input.val(this.formatDate(this.selectedDay, this.selectedMonth, this.selectedYear, this.selectedHour, this.selectedMinute));
		else Input.val(this.formatDate(this.selectedDay, this.selectedMonth, this.selectedYear));
	},
	
	/* Construct and display the calendar. */
	showCalendar: function() {
		this.popUpShowing = true;
		// build the calendar HTML
		var timeSelect = '';
		if (this.timeSeparators && this.timeSeparators.length > 1) {
			timeSelect += '<div id="calendar_time"><select id="calendar_hour">';
			
			if (this.timeSeparators.length == 4) {
				if (this.selectedHour == 12 || this.selectedHour == 0) timeSelect += '<option value="12" selected="selected">12</option>';
					else timeSelect += '<option value="12">12</option>';
				for (var a = 1; a < 12; a++) {
					if (this.selectedHour == a || (a == 12 && this.selectedHour == 0) || (a + 12 == this.selectedHour)) timeSelect += '<option value="' + a + '" selected="selected">' + a + '</option>';
					else timeSelect += '<option value="' + a + '">' + a + '</option>';
				}
			} else {
				for (var a = 0; a<24; a++) {
					if (this.selectedHour == a) timeSelect += '<option value="' + a + '" selected="selected">' + a  + '</option>';
					else timeSelect += '<option value="' + a + '">' + a + '</option>';
				}
			}
			
			timeSelect += '</select> ' + this.timeSeparators[1] + ' <select id="calendar_minute">';
			for (var a = 0; a < 59; a++) {
				if (this.selectedMinute == a) timeSelect += '<option value="' + a + '" selected="selected">' +  ((a >= 10) ? a : ('0' + a)) + '</option>';
				else timeSelect += '<option value="' + a + '">' +  ((a >= 10) ? a : ('0' + a)) + '</option>';
			}
			timeSelect +='</select>';
			
			if (this.timeSeparators.length == 4) {
				timeSelect += ' <select id="calendar_ampm">';
				timeSelect += '<option value="AM"' + ((this.selectedHour < 12) ? ' selected="selected"' : '') + '>' + this.timeSeparators[2] + '</option>';
				timeSelect += '<option value="PM"' + ((this.selectedHour >= 12) ? ' selected="selected"' : '') + '>' + this.timeSeparators[3] + '</option>';
				timeSelect += '</select>';
			}
			
			timeSelect +='</div>';
		}

		var html = (this.closeAtTop ? '<div id="calendar_control">' +
			'<a id="calendar_clear">' + this.clearText + '</a>' +
			'<a id="calendar_close">' + this.closeText + '</a></div>' : '') + 
			'<div id="calendar_links"><a id="calendar_prev">' + this.prevText + '</a>' +
			'<a id="calendar_current">' + this.currentText + '</a>' +
			'<a id="calendar_next">' + this.nextText + '</a></div>' +
			'<div id="calendar_header">';
		//alert(timeSelect);
		if (!this.changeMonth) {
			html += this.monthNames[this.selectedMonth] + '&nbsp;';
		}
		else {
			var inMinYear = (this.minDate && this.minDate.getFullYear() == this.selectedYear);
			var inMaxYear = (this.maxDate && this.maxDate.getFullYear() == this.selectedYear);
			html += '<select id="calendar_newMonth">';
			for (var month = 0; month < 12; month++) {
				if ((!inMinYear || month >= this.minDate.getMonth()) &&
						(!inMaxYear || month <= this.maxDate.getMonth())) {
					html += '<option value="' + month + '"' + 
						(month == this.selectedMonth ? ' selected="selected"' : '') + 
						'>' + this.monthNames[month] + '</option>';
				}
			}
			html += '</select>';
		}
		if (!this.changeYear) {
			html += this.selectedYear;
		}
		else {
			// determine range of years to display
			var years = this.yearRange.split(':');
			var year = 0;
			var endYear = 0;
			if (years.length != 2) {
				year = this.selectedYear - 10;
				endYear = this.selectedYear + 10;
			}
			else if (years[0].charAt(0) == '+' || years[0].charAt(0) == '-') {
				year = this.selectedYear + parseInt(years[0]);
				endYear = this.selectedYear + parseInt(years[1]);
			}
			else {
				year = parseInt(years[0]);
				endYear = parseInt(years[1]);
			}
			year = (this.minDate ? Math.max(year, this.minDate.getFullYear()) : year);
			endYear = (this.maxDate ? Math.min(endYear, this.maxDate.getFullYear()) : endYear);
			html += '<select id="calendar_newYear">';
			for (; year <= endYear; year++) {
				html += '<option value="' + year + '"' + 
					(year == this.selectedYear ? ' selected="selected"' : '') + 
					'>' + year + '</option>';
			}
			html += '</select>';
		}
		html += '</div>' + timeSelect + '<table id="calendar" cellpadding="0" cellspacing="0"><thead>' +
			'<tr class="calendar_titleRow">';
		for (var dow = 0; dow < 7; dow++) {
			html += '<td>' + (this.changeFirstDay ? '<a>' : '') + 
				this.dayNames[(dow + this.firstDay) % 7] + (this.changeFirstDay ? '</a>' : '') + '</td>';
		}
		html += '</tr></thead><tbody>';
		var daysInMonth = this.getDaysInMonth(this.selectedYear, this.selectedMonth);
		this.selectedDay = Math.min(this.selectedDay, daysInMonth);
		var leadDays = (this.getFirstDayOfMonth(this.selectedYear, this.selectedMonth) - this.firstDay + 7) % 7;
		var currentDate = new Date(this.currentYear, this.currentMonth, this.currentDay);
		var selectedDate = new Date(this.selectedYear, this.selectedMonth, this.selectedDay);
		var printDate = new Date(this.selectedYear, this.selectedMonth, 1 - leadDays);
		var numRows = Math.ceil((leadDays + daysInMonth) / 7); // calculate the number of rows to generate
		var today = new Date();
		today = new Date(today.getFullYear(), today.getMonth(), today.getDate()); // clear time
		for (var row = 0; row < numRows; row++) { // create calendar rows
			html += '<tr class="calendar_daysRow">';
			for (var dow = 0; dow < 7; dow++) { // create calendar days
				var customSettings = (this.customDate ? this.customDate(printDate) : [true, '']);
				var otherMonth = (printDate.getMonth() != this.selectedMonth);
				var unselectable = otherMonth || !customSettings[0] || 
					(this.minDate && printDate < this.minDate) || 
					(this.maxDate && printDate > this.maxDate);
				html += '<td class="calendar_daysCell' + 
					((dow + this.firstDay + 6) % 7 >= 5 ? ' calendar_weekEndCell' : '') + // highlight weekends
					(otherMonth ? ' calendar_otherMonth' : '') + // highlight days from other months
					(printDate.getTime() == selectedDate.getTime() ? ' calendar_daysCellOver' : '') + // highlight selected day
					(unselectable ? ' calendar_unselectable' : '') +  // highlight unselectable days
					(!otherMonth || this.showOtherMonths ? ' ' + customSettings[1] : '') + '"' + // highlight custom dates
					(printDate.getTime() == currentDate.getTime() ? ' id="calendar_currentDay"' : // highlight current day
					(printDate.getTime() == today.getTime() ? ' id="calendar_today"' : '')) + '>' + // highlight today (if different)
					(otherMonth ? (this.showOtherMonths ? printDate.getDate() : '&nbsp;') : // display for other months
					(unselectable ? printDate.getDate() : '<a>' + printDate.getDate() + '</a>')) + '</td>'; // display for this month
				printDate.setDate(printDate.getDate() + 1);
			}
			html += '</tr>';

		}
		html += '</tbody></table><!--[if lte IE 6.5]><iframe src="javascript:false;" id="calendar_cover"></iframe><![endif]-->' +

			(this.closeAtTop ? '' : '<div id="calendar_control"><a id="calendar_clear">' + this.clearText + '</a>' +

			'<a id="calendar_close">' + this.closeText + '</a></div>');
		// add calendar to element to calendar Div
		$('#calendar_div').empty().append(html).show(this.speed);
		this.input[0].focus();
		this.setupActions();
	}, // end showCalendar
	
	/* Initialisation. */
	init: function() {
		this.popUpShowing = false;
		this.lastInput = null;
		this.disabledInputs = [];
		$('body').append('<div id="calendar_div"></div>');
		$(document).mousedown(popUpCal.checkExternalClick);
	},
	
	/* Pop-up the calendar for a given input field. */
	showFor: function(target) {
		var input = (target.nodeName && target.nodeName.toLowerCase() == 'input' ? target : this);
		if (input.nodeName.toLowerCase() != 'input') { // find from button/image trigger
			input = $('../input', input)[0];
		}
		if (popUpCal.lastInput == input) { // already here
			return;
		}
		for (var i = 0; i < popUpCal.disabledInputs.length; i++) {  // check not disabled
			if (popUpCal.disabledInputs[i] == input) {
				return;
			}
		}
		popUpCal.input = $(input);
		popUpCal.hideCalendar();
		popUpCal.lastInput = input;
		popUpCal.setDateFromField();
		popUpCal.setPos(input, $('#calendar_div'));
		$.extend(popUpCal, (popUpCal.fieldSettings ? popUpCal.fieldSettings(input) : {}));
		popUpCal.showCalendar(); 
	},
	
	/* Handle keystrokes. */
	doKeyDown: function(e) {
		if (popUpCal.popUpShowing) {
			switch (e.keyCode) {
				case 9:  popUpCal.hideCalendar(); break; // hide on tab out
				case 13: popUpCal.selectDate(); break; // select the value on enter
				case 27: popUpCal.hideCalendar(popUpCal.speed); break; // hide on escape
				case 33: popUpCal.adjustDate(-1, (e.ctrlKey ? 'Y' : 'M')); break; // previous month/year on page up/+ ctrl
				case 34: popUpCal.adjustDate(+1, (e.ctrlKey ? 'Y' : 'M')); break; // next month/year on page down/+ ctrl
				case 35: if (e.ctrlKey) $('#calendar_clear').click(); break; // clear on ctrl+end
				case 36: if (e.ctrlKey) $('#calendar_current').click(); break; // current on ctrl+home
				case 37: if (e.ctrlKey) popUpCal.adjustDate(-1, 'D'); break; // -1 day on ctrl+left
				case 38: if (e.ctrlKey) popUpCal.adjustDate(-7, 'D'); break; // -1 week on ctrl+up
				case 39: if (e.ctrlKey) popUpCal.adjustDate(+1, 'D'); break; // +1 day on ctrl+right
				case 40: if (e.ctrlKey) popUpCal.adjustDate(+7, 'D'); break; // +1 week on ctrl+down
			}
		}
		else if (e.keyCode == 36 && e.ctrlKey) { // display the calendar on ctrl+home
			popUpCal.showFor(this);
		}
	},
		
	/* Filter entered characters. */
	doKeyPress: function(e) {
		var chr = String.fromCharCode(e.charCode == undefined ? e.keyCode : e.charCode);
		return (chr < ' ' || chr == popUpCal.dateFormat.charAt(3) || (chr >= '0' && chr <= '9')); // only allow numbers and separator
	},
	
	/* Attach the calendar to an input field. */
	connectCalendar: function(target) {
		var $input = $(target);
		$input.after('<span class="calendar_append">' + this.appendText + '</span>');
		if (this.autoPopUp == 'focus' || this.autoPopUp == 'both') { // pop-up calendar when in the marked fields
			$input.focus(this.showFor);
		}
		if (this.autoPopUp == 'button' || this.autoPopUp == 'both') { // pop-up calendar when button clicked
			$input.wrap('<span class="calendar_wrap"></span>').
				after(this.buttonImageOnly ? '<img class="calendar_trigger" src="' + 
				this.buttonImage + '" alt="' + this.buttonText + '" title="' + this.buttonText + '"/>' :
				'<button class="calendar_trigger">' + (this.buttonImage != '' ? 
				'<img src="' + this.buttonImage + '" alt="' + this.buttonText + '" title="' + this.buttonText + '"/>' : 
				this.buttonText) + '</button>');
			$((this.buttonImageOnly ? 'img' : 'button') + '.calendar_trigger', $input.parent('span')).click(this.showFor);
		}
		$input.keydown(this.doKeyDown).keypress(this.doKeyPress);
	},
	
	/* Enable the input field(s) for entry. */
	enableFor: function(inputs) {
		inputs = (inputs.jquery ? inputs : $(inputs));
		inputs.each(function() {
			this.disabled = false;
			$('../button.calendar_trigger', this).each(function() { this.disabled = false; });
			$('../img.calendar_trigger', this).each(function() { $(this).css('opacity', '1.0'); });
			var $this = this;
			popUpCal.disabledInputs = $.map(popUpCal.disabledInputs, 
				function(value) { return (value == $this ? null : value); }); // delete entry
		});
		return false;
	},
	
	/* Disable the input field(s) from entry. */
	disableFor: function(inputs) {
		inputs = (inputs.jquery ? inputs : $(inputs));
		inputs.each(function() {
			this.disabled = true;
			$('../button.calendar_trigger', this).each(function() { this.disabled = true; });
			$('../img.calendar_trigger', this).each(function() { $(this).css('opacity', '0.5'); });
			var $this = this;
			popUpCal.disabledInputs = $.map(popUpCal.disabledInputs, 
				function(value) { return (value == $this ? null : value); }); // delete entry
			popUpCal.disabledInputs[popUpCal.disabledInputs.length] = this;
		});
		return false;
	},
	
	/* Connect behaviours to the calendar. */
	setupActions: function() {
		if (this.timeSeparators && this.timeSeparators.length > 1) {
			$('#calendar_hour').change(function() {	//change hour
				popUpCal.selecting = false;
				popUpCal.selectedHour = this.options[this.selectedIndex].value - 0;
				if (popUpCal.timeSeparators.length == 4) {
					var ampm = $('#calendar_ampm').val();
					if (ampm == 'AM' && popUpCal.selectedHour == 12) popUpCal.selectedHour = 0;
					else if (ampm == 'PM' && popUpCal.selectedHour != 12) popUpCal.selectedHour += 12;
				}
				popUpCal.adjustDate(); 
				popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
			}).click(this.selectMonthYear);
			$("#calendar_minute").change(function() {	//change minute
				popUpCal.selecting = false;
				popUpCal.selectedMinute = this.options[this.selectedIndex].value - 0;
				popUpCal.adjustDate(); 
				popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
			}).click(this.selectMonthYear);;
			$("#calendar_ampm").change(function() {		//change am/pm
				popUpCal.selecting = false;
				if (popUpCal.timeSeparators.length == 4) {
					var ampm = $('#calendar_ampm').val();
					if (ampm == 'AM' && popUpCal.selectedHour > 12) popUpCal.selectedHour -= 12;
					else if (ampm == 'PM' && popUpCal.selectedHour < 12) popUpCal.selectedHour += 12;
					else if (ampm == 'PM'  && popUpCal.selectedHour == 12) popUpCal.selectedHour = 12;
					else if (ampm == 'AM' && popUpCal.selectedHour == 12) popUpCal.selectedHour = 0;
				}
				popUpCal.adjustDate();
				popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));				
			});
		}
		$('#calendar_clear').click(function() { // clear button link
			popUpCal.clearDate();
		});
		$('#calendar_close').click(function() { // close button link
			popUpCal.hideCalendar(popUpCal.speed);
		});
		$('#calendar_prev').click(function() { // setup navigation links
			popUpCal.adjustDate(-1, 'M'); 
			popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
		});
		$('#calendar_next').click(function() {
			popUpCal.adjustDate(+1, 'M'); 
			popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
		});
		$('#calendar_current').click(function() { // back to today
			popUpCal.selectedDay = new Date().getDate();
			popUpCal.selectedMonth = new Date().getMonth();
			popUpCal.selectedYear = new Date().getFullYear();
			popUpCal.adjustDate(); 
			popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
		});
		$('#calendar_newMonth').change(function() { // change month
			popUpCal.selecting = false;
			popUpCal.selectedMonth = this.options[this.selectedIndex].value - 0;
			popUpCal.adjustDate();
			popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
		}).click(this.selectMonthYear);
		$('#calendar_newYear').change(function() { // change year
			popUpCal.selecting = false;
			popUpCal.selectedYear = this.options[this.selectedIndex].value - 0;
			popUpCal.adjustDate(); 
			popUpCal.input.val(popUpCal.formatDate(popUpCal.selectedDay, popUpCal.selectedMonth, popUpCal.selectedYear, popUpCal.selectedHour, popUpCal.selectedMinute));
		}).click(this.selectMonthYear);
		$('.calendar_titleRow a').click(function() { // change first day of week
			for (var i = 0; i < 7; i++) {
				if (popUpCal.dayNames[i] == this.firstChild.nodeValue) {
					popUpCal.firstDay = i; 
				}
			}
			popUpCal.showCalendar();
		});
		$('.calendar_daysRow td a').hover( // highlight current day
             function() {
				$(this).addClass('calendar_daysCellOver');
            }, function() {
				$(this).removeClass('calendar_daysCellOver');
        });
        $('.calendar_daysRow td a').click(function() { // select day
            popUpCal.selectedDay = $(this).html();
            popUpCal.selectDate();
        });
		
	},
	
	/* Hide the calendar from view. */
	hideCalendar: function(speed) {
		if (this.popUpShowing) {
			$('#calendar_div').hide(speed);
			this.popUpShowing = false;
			this.lastInput = null;
		}
	},
	



	/* Restore input focus after not changing month/year. */
	selectMonthYear: function() { 
		if (popUpCal.selecting) {
			popUpCal.input[0].focus(); 
		}
		popUpCal.selecting = !popUpCal.selecting;
	},
	
	/* Erase the input field and hide the calendar. */
	clearDate: function() {
		this.hideCalendar(this.speed);
		this.input.val('');		
	},
	
	/* Close calendar if clicked elsewhere. */
	checkExternalClick: function(event) {
		if (popUpCal.popUpShowing) {
			var node = event.target;
			var cal = $('#calendar_div')[0];
			while (node && node != cal && node.className != 'calendar_trigger') {
				node = node.parentNode;
			}
			if (!node) {
				popUpCal.hideCalendar();
			}
		}
	},
	
	/* Set as customDate function to prevent selection of weekends. */
	noWeekends: function(date) {
		var day = date.getDay();
		return [(day > 0 && day < 6), ''];
	},
	
	/* Adjust one of the date sub-fields. */
	adjustDate: function(offset, period, dontShow) {
		if (this.timeSeparators && this.timeSeparators.length > 1) {
			var date = new Date(this.selectedYear + (period == 'Y' ? offset : 0), 
			this.selectedMonth + (period == 'M' ? offset : 0), 
			this.selectedDay + (period == 'D' ? offset : 0),
			this.selectedHour + (period == 'H' ? offset : 0),
			this.selectedMinute + (period == 'MIN' ? offset : 0));
		} else {
		var date = new Date(this.selectedYear + (period == 'Y' ? offset : 0), 
			this.selectedMonth + (period == 'M' ? offset : 0), 
			this.selectedDay + (period == 'D' ? offset : 0));
		}
		// ensure it is within the bounds set
		date = (this.minDate && date < this.minDate ? this.minDate : date);
		date = (this.maxDate && date > this.maxDate ? this.maxDate : date);
		this.selectedDay = date.getDate();
		this.selectedMonth = date.getMonth();
		this.selectedYear = date.getFullYear();
		if (this.timeSeparators && this.timeSeparators.length > 1) {
			this.selectedHour = date.getHours();
			this.selectedMinute = date.getMinutes();
		}
		
		if (!dontShow) {
			this.showCalendar();
		}
	},

	/* Find the number of days in a given month. */
	getDaysInMonth: function(year, month) {
		return 32 - new Date(year, month, 32).getDate();
	},
	
	/* Find the day of the week of the first of a month. */
	getFirstDayOfMonth: function(year, month) {
		return new Date(year, month, 1).getDay();
	},
	
	/* Set an object's position on the screen. */
	setPos: function(targetObj, moveObj) {
		var coords = this.findPos(targetObj);
		moveObj.css('position', 'absolute').css('left', coords[0] + 'px').
			css('top', (coords[1] + targetObj.offsetHeight) + 'px');
	},
	
	/* Find an object's position on the screen. */
	findPos: function(obj) {
		var curleft = curtop = 0;
		if (obj.offsetParent) {
			curleft = obj.offsetLeft;
			curtop = obj.offsetTop;
			while (obj = obj.offsetParent) {
				var origcurleft = curleft;
				curleft += obj.offsetLeft;
				if (curleft < 0) { 
					curleft = origcurleft;
				}
				curtop += obj.offsetTop;
			}
		}
		return [curleft,curtop];
	}
};

/* Attach the calendar to a jQuery selection. */
$.fn.calendar = function(settings) {
	// customise the calendar object
	$.extend(popUpCal, settings || {});
	// attach the calendar to each nominated input element
	return this.each(function() {
		if (this.nodeName.toLowerCase() == 'input') {
			popUpCal.connectCalendar(this);
		}
	});
};

/* Initialise the calendar. */
$(document).ready(function() {
   popUpCal.init();
});