/*
This javascript code are use for the calendar ...
*/

var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";

var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');
var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');
var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');

// these variables define the date formatting we're expecting and outputting.
// If you want to use a different format by default, change the defaultDateSeparator
// and defaultDateFormat variables either here or on your HTML page.
var defaultDateSeparator = "/";        // common values would be "/" or "."
var defaultDateFormat = "mdy"    // valid values are "mdy", "dmy", and "ymd"
var dateSeparator = defaultDateSeparator;
var dateFormat = defaultDateFormat;

/*var nf_Today = new Date('2006/08/22');
var nf_EndDate = new Date('2007/08/22');*/
var display_strict_date = true;

function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
{
	var targetDateField = document.getElementsByName (dateFieldName).item(0);

	// if we weren't told what node to display the datepicker beneath, just display it
	// beneath the date field we're updating
	if (!displayBelowThisObject)
	displayBelowThisObject = targetDateField;

	// if a date separator character was given, update the dateSeparator variable
	if (dtSep)
	dateSeparator = dtSep;
	else
	dateSeparator = defaultDateSeparator;

	// if a date format was given, update the dateFormat variable
	if (dtFormat)
	dateFormat = dtFormat;
	else
	dateFormat = defaultDateFormat;

	var x = displayBelowThisObject.offsetLeft;
	var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;

	// deal with elements inside tables and such
	var parent = displayBelowThisObject;
	while (parent.offsetParent) {
		parent = parent.offsetParent;
		x += parent.offsetLeft;
		y += parent.offsetTop ;
	}

	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.className = "dpDiv"; //setAttribute("class", "dpDiv");
	pickerDiv.style.width = 170 + "px";
	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;

	// draw the datepicker table
	refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
}


/**
This is the function that actually draws the datepicker calendar.
*/
function refreshDatePicker(dateFieldName, year, month, day)
{

	//var thisDay = new Date();
	var thisDay = new Date(nf_Today);
	var startDate = new Date(nf_Today);
	startDate.add('d', 1);

	// the following vars are added by Naing Myo Aung.
	// prefix nf means new feature
	nf_ThisYear = nf_Today.getFullYear();
	nf_ThisMonth = nf_Today.getMonth();
	nf_ThisDate = nf_Today.getDate();

	nf_EndYear = nf_EndDate.getFullYear();
	nf_EndMonth = nf_EndDate.getMonth();
	nf_EndDay = nf_EndDate.getDate();

	if(display_strict_date){
		if((year < nf_ThisYear) || (year == nf_ThisYear && month < nf_ThisMonth)) {
			/* year = nf_Today.getFullYear();
			Month = nf_Today.getMonth();
			day = nf_Today.getDate(); */
			return false;
		}
		if((year > nf_EndYear) || (year == nf_EndYear && month > nf_EndMonth)) {
			/* year = nf_EndDate.getFullYear();
			Month = nf_EndDate.getMonth();
			day = nf_EndDate.getDate(); */
			return false;
		}
	}

	if ((month >= 0) && (year > 0)) {
		thisDay = new Date(year, month, 1);
	} else {
		day = startDate.getDate();
		thisDay.setDate(1);
	}


	var crlf = "\r\n";
	var TABLE = "<table cols=7 class='dpTable1'>" + crlf;
	var TABLE2 = "<table cols=7 class='dpTable2'>" + 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 nf_dTD_Today = "<td class='dpTD_Today' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' ";
	var nf_dTD = "<td class='dpTD_disabled' ";
	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 DIV_Today = "<div class='dpTD_Today'>";
	var xDIV = "</div>";

	// start generating the code for the calendar table
	var html = TABLE;

	// this is the title bar, which displays the month and the buttons to
	// go back to a previous month or forward to the next month
	html += TR_title;
	html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;") + xTD;
	html += TD_title + DIV_title + monthArrayShort[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
	//html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
	html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;") + xTD;
	html += xTR;

	// this is the row that indicates which day of the week we're on
	html += TR_days;
	for(i = 0; i < dayArrayShort.length; i++)
	html += TD_days + dayArrayShort[i] + xTD;
	html += xTR;

	// now we'll start populating the table with days of the month
	html += TR;

	// first, the leading blanks
	for (i = 0; i < thisDay.getDay(); i++)
	html += nf_dTD + ">&nbsp;" + xTD;

	// now, the days of the month
	var TD_onclick = '';
	do {
		dayNum = thisDay.getDate();

		if ((nf_ThisYear == thisDay.getFullYear()) && (thisDay.getMonth() == nf_ThisMonth) && (thisDay.getDate() < nf_ThisDate)){
			TD_onclick = ">";
		}else{
			TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
		}

		// applying strict date functionality
		if(display_strict_date){
			// old days disabled
			if ((nf_ThisYear == thisDay.getFullYear()) && (thisDay.getMonth() == nf_ThisMonth) && (dayNum < nf_ThisDate))
			html += nf_dTD + TD_onclick + dayNum + xTD;
			// selected day hilighted
			else if (dayNum == day)
			html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
			// today
			else if ((nf_ThisYear == thisDay.getFullYear()) && (thisDay.getMonth() == nf_ThisMonth) && (dayNum == nf_ThisDate))
			html += nf_dTD + ">" + DIV_Today + dayNum + xDIV + xTD;
			// others
			else
			html += TD + TD_onclick + dayNum + xTD;
		}else{
			if (dayNum == day)
			html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
			else
			html += TD + TD_onclick + dayNum + xTD;
		}

		// if this is a Saturday, start a new row
		if (thisDay.getDay() == 6)
		html += xTR + TR;

		// increment the day
		thisDay.setDate(thisDay.getDate() + 1);
	} while (thisDay.getDate() > 1)

	// fill in any trailing blanks
	if (thisDay.getDay() > 0) {
		for (i = 6; i > thisDay.getDay(); i--)
		html += nf_dTD + ">&nbsp;" + xTD;
	}
	html += xTR;
	// and finally, close the table
	html += xTABLE;


//###################################################################################################################

	var nf_nextMonth = thisDay.add('M', 0);
	html += TABLE2;
	html += TR_title;
	//html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;") + xTD;
	html += "<td></td>" + TD_title + DIV_title + monthArrayShort[ nf_nextMonth.getMonth()] + " " + nf_nextMonth.getFullYear() + xDIV + xTD + "<td></td>";
	//html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
	//html += TD_buttons + getButtonCode(dateFieldName, nf_nextMonth, 1, "&gt;") + xTD;
	//html += xTR;

	// this is the row that indicates which day of the week we're on
	html += TR_days;
	for(i = 0; i < dayArrayShort.length; i++)
	html += TD_days + dayArrayShort[i] + xTD;
	html += xTR;

	// now we'll start populating the table with days of the month
	html += TR;

	// first, the leading blanks
	for (i = 0; i < nf_nextMonth.getDay(); i++)
	html += nf_dTD + ">&nbsp;" + xTD;

	// now, the days of the month
	var TD_onclick = '';
	do {
		dayNum = nf_nextMonth.getDate();


		TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
		html += TD + TD_onclick + dayNum + xTD;


		// if this is a Saturday, start a new row
		if (nf_nextMonth.getDay() == 6)
		html += xTR + TR;

		// increment the day
		nf_nextMonth.setDate(nf_nextMonth.getDate() + 1);
	} while (nf_nextMonth.getDate() > 1)

	// fill in any trailing blanks
	if (nf_nextMonth.getDay() > 0) {
		for (i = 6; i > nf_nextMonth.getDay(); i--)
		html += nf_dTD + ">&nbsp;" + xTD;
	}
	html += xTR;

	// add a button to allow the user to easily return to today, or close the calendar
	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 + "\");'>this month</button> ";
	html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>close</button>";
	html += xTD + xTR;

	// and finally, close the table
	html += xTABLE;
//###################################################################################################################

	document.getElementById(datePickerDivID).innerHTML = html;
	// add an "iFrame shim" to allow the datepicker to display above selection lists
	adjustiFrame();
}


/**
Convenience function for writing the code for the buttons that bring us back or forward
a month.
*/
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>";
}


/**
Convert a JavaScript Date object to a string, based on the dateFormat and dateSeparator
variables at the beginning of this script library.
*/
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();
	}
}


/**
Convert a string to a JavaScript Date object.
*/
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;
}


/**
Try to split a date string into an array of elements, using common date separators.
If the date is split, an array is returned; otherwise, we just return false.
*/
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 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();

	// after the datepicker has closed, optionally run a user-defined function called
	// datePickerClosed, passing the field that was just updated as a parameter
	// (note that this will only run if the user actually selected a date from the datepicker)
	if ((dateString) && (typeof(datePickerClosed) == "function"))
	datePickerClosed(targetDateField);
}

function adjustiFrame(pickerDiv, iFrameDiv)
{
	// we know that Opera doesn't like something about this, so if we
	// think we're using Opera, don't even try
	var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
	if (is_opera)return;

	// put a try/catch block around the whole thing, just in case
	try {
		if (!document.getElementById(iFrameDivID)) {
			// don't use innerHTML to update the body, because it can cause global variables
			// that are currently pointing to objects on the page to have bad references
			//document.body.innerHTML += "<iframe id='" + iFrameDivID + "' src='javascript:false;' scrolling='no' frameborder='0'>";
			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)
	{
	}

}

// Add an amount of time to a date. Negative numbers can be passed to subtract time.
Date.prototype.add = function(interval, number) {
	if (typeof(interval)=="undefined" || interval==null || typeof(number)=="undefined" || number==null) {
		return this;
	}
	number = +number;
	if (interval=='y') { // year
		this.setFullYear(this.getFullYear()+number);
	}
	else if (interval=='M') { // Month
		this.setMonth(this.getMonth()+number);
	}
	else if (interval=='d') { // Day
		this.setDate(this.getDate()+number);
	}
	else if (interval=='w') { // Weekday
		var step = (number>0)?1:-1;
		while (number!=0) {
			this.add('d',step);
			while(this.getDay()==0 || this.getDay()==6) {
				this.add('d',step);
			}
			number -= step;
		}
	}
	else if (interval=='h') { // Hour
		this.setHours(this.getHours() + number);
	}
	else if (interval=='m') { // Minute
		this.setMinutes(this.getMinutes() + number);
	}
	else if (interval=='s') { // Second
		this.setSeconds(this.getSeconds() + number);
	}
	return this;
}