// Librairie jQuery de sélection de date par calendrier pop-up.
// Version 1.5
// Créer par Marc-André Lamothe
// Copyright 2009 Vortex Solution.
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var calendarMonths = null;
var calendarWeekdays = null;
var calendarField = '';
var calendarCallback = null;
var calendarMonth = null;
var calendarYear = null;
var calendarTimeout = null;

function getFullYear(date)
{
	if (date.getFullYear)
		return date.getFullYear();
	var Year = date.getYear() % 100;
	return Year + (Year < 38 ? 2000 : 1900);
}
	
function getSelectedDate(fieldId)
{
	var strings = $('#'+fieldId).val().split("-");
	var date = new Date();
	date.setFullYear(parseInt(strings[0],10));
	date.setMonth(parseInt(strings[1],10)-1);
	date.setDate(parseInt(strings[2],10));
	return date;
}

function daysInMonth(date)
{
	var Year = getFullYear(date);
	var Month = date.getMonth();
	var Values = [31,28,31,30,31,30,31,31,30,31,30,31];
	if (Month == 1 && ((Year % 4 == 0 && Year % 100 != 0) || (Year % 4 == 0 && Year % 100 == 0 && Year % 400 == 0)))
		return 29;
	return Values[Month];
}

function gotoMonth(Year,Month)
{
	calendarMonth = Month;
	calendarYear = Year;
	// Update the calendar
	$('#month').html(calendarMonths[calendarMonth]);
	$('#year').html(calendarYear);
	loadCalendarContent();
	// Hide the menus
	$('#CalendarYears').hide();
	$('#CalendarMonths').hide();
}

function gotoNextMonth()
{
	gotoMonth((calendarMonth < 11 ? calendarYear : calendarYear+1),(calendarMonth < 11 ? calendarMonth+1 : 0));
}

function gotoPreviousMonth()
{
	gotoMonth((calendarMonth > 0 ? calendarYear : calendarYear-1),(calendarMonth > 0 ? calendarMonth-1 : 11));
}

function hideCalendar(callback)
{
	calendarMonths = null;
	calendarweekdays = null;
	clearTimeout(calendarTimeout);
	// Hide the calendar
	if (callback != null && typeof callback == "function")
		$('#Calendar').fadeOut(100,callback);
	else
		$('#Calendar').fadeOut(100);
	// Hide the menus
	$('#CalendarYears').hide();
	$('#CalendarMonths').hide();
}

function loadCalendarContent()
{
	var content = $('#CalendarContent');
	if (content.length && calendarMonth && calendarYear)
	{
		content.empty();
		
		// Calendar weekdays
		var weekdays = $("<div></div>").addClass('weekdays').css('margin','0px auto').css('padding','1px 0 0 1px').width(22*7+(jQuery.support.boxModel ? 0 : 1));
		for (var i=0; i < 7; i++)
			weekdays.append($("<div></div>").html(calendarWeekdays[i]).css('float','left').css('margin','0 1px 1px 0').css('text-align','center').width(21));
		weekdays.append($("<br>").attr('clear','all'));
		content.append(weekdays);
		weekdays = null;
		
		// Calendar days
		var today = new Date();
		var nbOfDays = daysInMonth(new Date(calendarYear, calendarMonth, 1));
		var paddingLeft = new Date(calendarYear, calendarMonth, 1).getDay();
		var paddingRight = Math.max(7-(paddingLeft+nbOfDays)%7, 0);
		if (paddingRight == 7)
			paddingRight = 0;
		var days = $("<div></div>").addClass('days').css('margin','0px auto').css('padding','1px 0 0 1px').width(22*7+(jQuery.support.boxModel ? 0 : 1));
		for (var i = 1-paddingLeft; i <= nbOfDays+paddingRight; i++)
			if (i <= 0 || i > nbOfDays)
				days.append($("<div></div>").html('&nbsp;').css('float','left').css('margin','0 1px 1px 0').css('padding','3px 0 3px 0').width(21));
			else
				days.append($("<a></a>").attr('href','javascript:selectDate(\''+calendarYear+'-'+((calendarMonth+1) < 10 ? '0'+(calendarMonth+1) : (calendarMonth+1))+'-'+(i < 10 ? '0'+i : i)+'\')').text(i).addClass(calendarYear == getFullYear(today) && calendarMonth == today.getMonth() && i == today.getDate() ? 'today' : '').css('float','left').css('margin','0 1px 1px 0').css('padding','3px 0 3px 0').css('text-align','center').css('vertical-align','middle').width(21));
		days.append($("<br>").attr('clear','all'));
		content.append(days);
		days = null;
		today = null;
	}
	content = null;
}

function showMonthsMenu()
{
	// Find or create the menu container
	var menu = $('#CalendarMonths');
	if (menu.length == 0)
	{
		menu = $("<div></div>").addClass('menu').attr('id','CalendarMonths').css('display','none').css('padding','1px 3px 1px 3px').css('position','absolute').css('z-index','1000');
		var list = $("<ul></ul>").css('list-style','none').css('margin','0').css('padding','0');
		for (var i = 0; i < 12; i++)
			list.append($("<li></li>").css('margin','0').css('padding','0').append($("<a></a>").addClass(i == calendarMonth ? 'selected' : '').attr('href','javascript:gotoMonth('+calendarYear+','+i+')').html(calendarMonths[i])));
		menu.append(list);
		list = null;
		$('#Calendar').append(menu);
	}
	// Toggle the menu display
	if (menu.is(":hidden"))
		menu.css('top',($('#month').position().top+$('#month').outerHeight())+'px').css('left',$('#month').position().left+'px');
	menu.toggle();
	menu = null;
	// Hide the other menu
	$('#CalendarYears').hide();
}

function showYearsMenu()
{
	// Find or create the menu container
	var menu = $('#CalendarYears');
	if (menu.length == 0)
	{
		menu = $("<div></div>").addClass('menu').attr('id','CalendarYears').css('display','none').css('overflow','auto').css('padding','1px 3px 1px 3px').css('position','absolute').css('width','5em').css('z-index','1000').height(140);
		var list = $("<ul></ul>").css('list-style','none').css('margin','0').css('padding','0');
		var scrollTop = 0;
		for (var i = 1980; i < 2080; i++)
			list.append($("<li></li>").append($("<a></a>").addClass(i == calendarYear ? 'selected' : '').attr('href','javascript:gotoMonth('+i+','+calendarMonth+')').html(i)));
		menu.append(list);
		list = null;
		$('#Calendar').append(menu);
	}
	// Toggle the menu display
	if (menu.is(":hidden"))
		menu.css('top',($('#year').position().top+$('#year').outerHeight())+'px').css('left',$('#year').position().left+'px');
	menu.toggle();
	if (menu.is(":visible"))
		menu.scrollTop(Math.max((calendarYear-1980)*menu.children(':first').children(':first').height(),0));
	menu = null;
	// Hide the other menu
	$('#CalendarMonths').hide();
}

function selectDate(date)
{
	// Change the value of the calendar's field
	$('#'+calendarField).val(date);
	// Hide the calendar
	hideCalendar(calendarCallback);
}

function toggleCalendar(fieldId,lang,placementFieldId,callbackFunction)
{
	// Find or create the calendar container
	var calendar = $('#Calendar');
	if (calendar.length == 0)
	{
		// Calendar
		calendar = $("<div></div>").attr('id','Calendar').css('display','none').css('padding','3px').css('position','absolute').css('z-index','1000').width((22*7)+3);
		calendar.mouseenter(function(){ clearTimeout(calendarTimeout); }).mouseleave(function(){ calendarTimeout = setTimeout("hideCalendar()",5000); });
		
		// Calendar controls
		var form = $("<div></div>").addClass('controls').css('margin','0 0 5px 0').css('text-align','center');
		form.append($("<a></a>").css('float','left').attr('href','javascript:gotoPreviousMonth();').append($("<img>").attr('src','data:image/gif;base64,R0lGODlhCgALAIAAAP///wAAACH5BAAAAAAALAAAAAAKAAsAAAIXjI8By2utonIRPPskzpjW22nMNzVechQAOw%3D%3D').css('border','none').css('margin','0')));
		form.append($("<a></a>").css('float','right').attr('href','javascript:gotoNextMonth();').append($("<img>").attr('src','data:image/gif;base64,R0lGODlhCgALAIAAAP///wAAACH5BAAAAAAALAAAAAAKAAsAAAIYjI8By2ugFHtRwnglzRVmhz2gZ11Nk6QFADs%3D').css('border','none').css('margin','0')));
		form.append($("<div></div>").attr('id','month').css('display','inline').css('margin','0 3px 0 6px'));
		form.append($("<a></a>").attr('href','javascript:showMonthsMenu();').append($("<img>").attr('src','data:image/gif;base64,R0lGODlhDAAKAIAAAP///wAAACH5BAAAAAAALAAAAAAMAAoAAAIWjI8Hy22Q1IszrHhtftnp3oRcyFBRAQA7').css('border','none')));
		form.append($("<div></div>").attr('id','year').css('display','inline').css('margin','0 3px 0 6px'));
		form.append($("<a></a>").attr('href','javascript:showYearsMenu();').append($("<img>").attr('src','data:image/gif;base64,R0lGODlhDAAKAIAAAP///wAAACH5BAAAAAAALAAAAAAMAAoAAAIWjI8Hy22Q1IszrHhtftnp3oRcyFBRAQA7').css('border','none')));
		calendar.append(form);
		form = null;
		
		// Calendar content
		calendar.append($("<div></div>").attr('id','CalendarContent'));
		
		$(document.body).append(calendar);
	}
	if (fieldId != calendarField && calendar.is(":visible"))
		hideCalendar(function(){ toggleCalendar(fieldId,lang,placementFieldId,callbackFunction) });
	else if (calendar.is(":hidden"))
	{
		// Set calendar variables
		if (lang == 'fr')
		{
			calendarMonths = new Array('Janvier','F&eacute;vrier','Mars','Avril','Mai','Juin','Juillet','Ao&ucirc;t','Septembre','Octobre','Novembre','D&eacute;cembre');
			calendarWeekdays = new Array('D','L','M','M','J','V','S');
		}
		else
		{
			calendarMonths = new Array('January','February','March','April','May','June','July','August','September','October','November','December');
			calendarWeekdays = new Array('S','M','T','W','T','F','S');
		}
		calendarField = fieldId;
		calendarCallback = callbackFunction;
		var d = getSelectedDate(fieldId);
		if (isNaN(d))
			d = new Date();
		gotoMonth(getFullYear(d),d.getMonth());
		d = null;
		// Open the calendar
		if (placementFieldId == null || placementFieldId.length == 0)
			placementFieldId = fieldId;
		calendar.css('top',($('#'+placementFieldId).offset().top+$('#'+placementFieldId).outerHeight())+'px').css('left',$('#'+placementFieldId).offset().left+'px');
		calendar.fadeIn(100, function() { calendarTimeout = setTimeout("hideCalendar()",5000) });
	}
	else
		hideCalendar();
	calendar = null;
}