var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";
var dayArrayShort = new Array('Di', 'Lu', 'Ma', 'Me', 'Je', 'Ve', 'Sa');
var dayArrayMed = new Array('Dim', 'Lun', 'Mar', 'Mer', 'Jeu', 'Ven', 'Sam');
var dayArrayLong = new Array('Dimanche', 'Lundi', 'Mardi', 'Mercredi', 'Jeudi', 'Vendredi', 'Samedi');
var monthArrayShort = new Array('Jan', 'Fév', 'Mar', 'Av', 'Mai', 'Jui', 'Jui', 'Aoû', 'Sep', 'Oct', 'Nov', 'Déc');
var monthArrayMed = new Array('Jan', 'Fév', 'Mars', 'Avr', 'Mai', 'Juin', 'Juil', 'Août', 'Sept', 'Oct', 'Nov', 'Déc');
var monthArrayLong = new Array('Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin', 'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre');
var defaultDateSeparator = "/";     
var defaultDateFormat = "dmy"   
var dateSeparator = defaultDateSeparator;
var dateFormat = defaultDateFormat;

function displayDatePickerDuAu(dateFieldNameDu, dateFieldNameAu, displayBelowThisObject, dtFormat, dtSep)
{
	// Si le champs Du est rempli et le champs Au est vide on utilise la date du champs Du 
	var targetDateFieldDu = document.getElementsByName (dateFieldNameDu).item(0);
	var targetDateFieldAu = document.getElementsByName (dateFieldNameAu).item(0);
	
	if (targetDateFieldDu.value != "" && targetDateFieldAu.value == "")
	{
		targetDateFieldAu.value = targetDateFieldDu.value;
	}
	
	// On excute la commande normale
	displayDatePicker(dateFieldNameAu, displayBelowThisObject, dtFormat, dtSep);
}

function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
{
	var targetDateField = document.getElementsByName (dateFieldName).item(0);
	if (!displayBelowThisObject) displayBelowThisObject = targetDateField;
	if (dtSep) dateSeparator = dtSep;
	else dateSeparator = defaultDateSeparator;
	if (dtFormat) dateFormat = dtFormat;
	else dateFormat = defaultDateFormat;
		
	var champ_date = document.getElementById(dateFieldName);
	champ_date.style.position = "relative";
	var x = 0;
	var y = 0;
	if (champ_date.offsetParent) 
	{
		x = champ_date.offsetLeft;
		y = champ_date.offsetTop;
		while (champ_date = champ_date.offsetParent) 
		{
			x += champ_date.offsetLeft;
			y += champ_date.offsetTop;
		}
	}
	y = y + 25;
	
	drawDatePicker(targetDateField, x, y);
}

function drawDatePicker(targetDateField, x, y)
{

	var dt = getFieldDate(targetDateField.value );
	if (!document.getElementById(datePickerDivID)) 
	{
		var newNode = document.createElement("div");
		newNode.setAttribute("id", datePickerDivID);
		newNode.setAttribute("class", "dpDiv");
		newNode.setAttribute("style", "visibility: hidden;");
		document.body.appendChild(newNode);
	}
	var pickerDiv = document.getElementById(datePickerDivID);
	pickerDiv.style.position = "absolute";
	pickerDiv.style.left = x + "px";
	pickerDiv.style.top = y + "px";
	pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
	pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
	pickerDiv.style.zIndex = 10000;
	refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
}

function refreshDatePicker(dateFieldName, year, month, day)
{
	var thisDay = new Date(); 
	if ((month >= 0) && (year > 0)) 
	{
		thisDay = new Date(year, month, 1);
	} 
	else 
	{
		day = thisDay.getDate();
		thisDay.setDate(1);
	}
	var crlf = "\r\n";
	var TABLE = "<table cols=7 class='dpTable'>" + crlf;
	var xTABLE = "</table>" + crlf;
	var TR = "<tr class='dpTR'>";
	var TR_title = "<tr class='dpTitleTR'>";
	var TR_days = "<tr class='dpDayTR'>";
	var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
	var xTR = "</tr>" + crlf;
	var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
	var TD_title = "<td colspan=5 class='dpTitleTD'>";
	var TD_buttons = "<td class='dpButtonTD'>";
	var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
	var TD_days = "<td class='dpDayTD'>";
	var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
	var xTD = "</td>" + crlf;
	var DIV_title = "<div class='dpTitleText'>";
	var DIV_selected = "<div class='dpDayHighlight'>";
	var xDIV = "</div>";
	var html = TABLE;
	html += TR_title;
	html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;") + xTD;
	html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
	html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;") + xTD;
	html += xTR;
	html += TR_days;
	for(i = 0; i < dayArrayShort.length; i++) html += TD_days + dayArrayShort[i] + xTD;
	html += xTR;
	html += TR;
	for (i = 0; i < thisDay.getDay(); i++) html += TD + "&nbsp;" + xTD;
	do 
	{
		dayNum = thisDay.getDate();
		TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
		if (dayNum == day) html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
		else html += TD + TD_onclick + dayNum + xTD;
		if (thisDay.getDay() == 6) html += xTR + TR;
		thisDay.setDate(thisDay.getDate() + 1);
	} while (thisDay.getDate() > 1)
	if (thisDay.getDay() > 0) 
	{
		for (i = 6; i > thisDay.getDay(); i--) html += TD + "&nbsp;" + xTD;
	}
	html += xTR; 
	var today = new Date();
	var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
	html += TR_todaybutton + TD_todaybutton;
	html += "<button class='dpTodayButton' onClick='refreshDatePicker(\"" + dateFieldName + "\");' style='width:82px'>Aujourd'hui</button> ";
	html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");' style='width:60px'>Fermer</button>";
	html += xTD + xTR;
	html += xTABLE; 
	document.getElementById(datePickerDivID).innerHTML = html;
	adjustiFrame();
}

function getButtonCode(dateFieldName, dateVal, adjust, label)
{
	var newMonth = (dateVal.getMonth () + adjust) % 12;
	var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
	if (newMonth < 0) 
	{
		newMonth += 12;
		newYear += -1;
	}
	return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");'>" + label + "</button>";
}

function getDateString(dateVal)
{
	var dayString = "00" + dateVal.getDate();
	var monthString = "00" + (dateVal.getMonth()+1);
	dayString = dayString.substring(dayString.length - 2);
	monthString = monthString.substring(monthString.length - 2); 
	switch (dateFormat) 
	{
		case "dmy" : return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
		case "ymd" : return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
		case "mdy" :
		default : return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
	}
}

function getFieldDate(dateString)
{
	var dateVal;
	var dArray;
	var d, m, y;
	try 
	{
		dArray = splitDateString(dateString);
		if (dArray) 
		{
 			switch (dateFormat) 
 			{
   				case "dmy" :
     				d = parseInt(dArray[0], 10);
     				m = parseInt(dArray[1], 10) - 1;
     				y = parseInt(dArray[2], 10);
     				break;
   				case "ymd" :
     				d = parseInt(dArray[2], 10);
     				m = parseInt(dArray[1], 10) - 1;
     				y = parseInt(dArray[0], 10);
     				break;
   				case "mdy" :
   				default :
     				d = parseInt(dArray[1], 10);
     				m = parseInt(dArray[0], 10) - 1;
     				y = parseInt(dArray[2], 10);
     				break;
 			}
 			dateVal = new Date(y, m, d);
		} 
		else if (dateString) 
		{
 			dateVal = new Date(dateString);
		} 
		else 
		{
 			dateVal = new Date();
		}
	} 
	catch(e) 
	{
		dateVal = new Date();
	}
	return dateVal;
}

function splitDateString(dateString)
{
	var dArray;
	if (dateString.indexOf("/") >= 0) dArray = dateString.split("/");
	else if (dateString.indexOf(".") >= 0) dArray = dateString.split(".");
	else if (dateString.indexOf("-") >= 0) dArray = dateString.split("-");
	else if (dateString.indexOf("\\") >= 0) dArray = dateString.split("\\");
	else dArray = false;
	return dArray;
}

function datePickerClosed(dateField)
{
	var dateObj = getFieldDate(dateField.value);
	var today = new Date();
	today = new Date(today.getFullYear(), today.getMonth(), today.getDate());
	if (dateField.name == "StartDate") 
	{
		if (dateObj < today) 
		{
 			alert("Please enter a date that is today or later");
 			dateField.value = "";
 			document.getElementById(datePickerDivID).style.visibility = "visible";
 			adjustiFrame();
		} 
		else 
		{
 			dateObj.setTime(dateObj.getTime() + (7 * 24 * 60 * 60 * 1000));
 			var endDateField = document.getElementsByName ("EndDate").item(0);
 			endDateField.value = getDateString(dateObj);
		}
	}
}

function updateDateField(dateFieldName, dateString)
{
	var targetDateField = document.getElementsByName (dateFieldName).item(0);
	if (dateString) targetDateField.value = dateString;
	var pickerDiv = document.getElementById(datePickerDivID);
	pickerDiv.style.visibility = "hidden";
	pickerDiv.style.display = "none";
	adjustiFrame();
	targetDateField.focus();
	if ((dateString) && (typeof(datePickerClosed) == "function")) datePickerClosed(targetDateField);
}

function adjustiFrame(pickerDiv, iFrameDiv)
{
	var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
	if (is_opera) return;
	try 
	{
		if (!document.getElementById(iFrameDivID)) 
		{
 			var newNode = document.createElement("iFrame");
 			newNode.setAttribute("id", iFrameDivID);
 			newNode.setAttribute("src", "javascript:false;");
 			newNode.setAttribute("scrolling", "no");
 			newNode.setAttribute ("frameborder", "0");
 			document.body.appendChild(newNode);
		}    
		if (!pickerDiv) pickerDiv = document.getElementById(datePickerDivID);
		if (!iFrameDiv) iFrameDiv = document.getElementById(iFrameDivID);
		try 
		{
 			iFrameDiv.style.position = "absolute";
 			iFrameDiv.style.width = pickerDiv.offsetWidth;
 			iFrameDiv.style.height = pickerDiv.offsetHeight ;
 			iFrameDiv.style.top = pickerDiv.style.top;
 			iFrameDiv.style.left = pickerDiv.style.left;
 			iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
 			iFrameDiv.style.visibility = pickerDiv.style.visibility ;
 			iFrameDiv.style.display = pickerDiv.style.display;
		} 
		catch(e) 
		{
		}
	} 
	catch (ee) 
	{
	}
}