// ********************
// Begin Popup Calendar
// ********************

var popCalDstFld;
var temp;
var popCalWin;
 
function popupCal()
{	
	//debugger;			//remove slashes to activate debugging in Visual Studio
	var tmpDate         = new Date();
	var tmpString       = "";
	var tmpNum          = 0;
	var popCalDateVal;
	var dstWindowName   = "";

	//Initialize the window to an empty object.
	popCalWin = new Object();
	
	//Check for the right number of arguments
	if (arguments.length < 2)
	{
		
		alert("popupCal(): Wrong number of arguments.");
		return void(0);
	}
	
	//Get the command line arguments -- Localization is optional
	dstWindowName = popupCal.arguments[0];
	popCalDstFld = popupCal.arguments[1];
	temp = popupCal.arguments[1];
	popCalDstFmt = popupCal.arguments[2];  //Localized Short Date Format String
	popCalMonths = popupCal.arguments[3];  //Localized Month Names String
	popCalDays = popupCal.arguments[4];  //Localized Day Names String
	
	//check destination field name
	if (popCalDstFld != "")
	 {
		
		popCalDstFld = document.getElementById(popCalDstFld);
	 }
	
	 if (popCalDstFmt == "m/d/yyyy")
	  popCalDstFmt = "m/d/yyyy";

	//default localized short date format if not provided
	if (popCalDstFmt == "")
	  popCalDstFmt = "MM/dd/yyyy";

	//default localized months string if not provided
	if (popCalMonths == "")
	  popCalMonths = "January,February,March,April,May,June,July,August,September,October,November,December";
 
	//default localized months string if not provided
	if (popCalDays == "")
	  popCalDays = "Sun,Mon,Tue,Wed,Thu,Fri,Sat";
 
	tmpString = new String(popCalDstFld.value);  
	
	//If tmpString is empty (meaning that the field is empty) 
	//use todays date as the starting point
	
	if(tmpString == "")
		popCalDateVal = new Date();
	else if(!isDate(tmpString))
	{
		popCalDateVal = new Date();
	}
	else
	{
		//Make sure the century is included, if it isn't, add this 
		//century to the value that was in the field
		tmpNum = tmpString.lastIndexOf( "/" );
		if ( (tmpString.length - tmpNum) == 3 )
		{
		 	tmpString = tmpString.substring(0,tmpNum + 1)+"20"+tmpString.substr(tmpNum+1);
		 	popCalDateVal = new Date(tmpString);		 				
		}
		else
		{
			//localized date support:
			//If we got to this point, it means the field that was passed 
			//in has no slashes in it. Use an extra function to build the date 
			//according to supplied date formatstring.
			//alert(tmpString);
			//alert(popCalDstFmt);
			popCalDateVal = getDateFromFormat(tmpString,"MM/dd/yyyy");			
		}
	}
	
	//Make sure the date is a valid date.  Set it to today if it is invalid
	//"NaN" is the return value for an invalid date
	if( popCalDateVal.toString() == "NaN" || popCalDateVal.toString() == 0 )
	{
		popCalDateVal = new Date();
		//popCalDstFld.value = "";
	}
			
	//Set the base date to midnight of the first day of the specified month, 
	//this makes things easier?
 	try
 	{
 		var dateString = (popCalDateVal.getMonth()+1) + "/" + popCalDateVal.getDate() + "/" + popCalDateVal.getFullYear();
 	}
 	catch(e)
 	{ 	    
 	}	
	
	//Call the routine to draw the initial calendar
	reloadCalPopup(dateString, dstWindowName);
	
	return void(0);
}
 
function closeCalPopup()
{
	//Can't tell the child window to close itself, the parent window has to 
	//tell it to close.
	popCalWin.close();
	return void(0);
}
 
function reloadCalPopup() //[0]dateString, [1]dstWindowName
{
	//Set the window's features here

	var windowFeatures = "toolbar=no, location=no, status=no, menubar=no, scrollbars=no, resizable=no, height=250, width=300, top=" + ((screen.height - 270)/2).toString()+",left="+((screen.width - 270)/2).toString();
	var tmpDate = new Date( reloadCalPopup.arguments[0] );
	
	if (tmpDate.toString() == "Invalid Date")
	    tmpDate = new Date();
	
	tmpDate.setDate(1);
	
	//Get the calendar data
	var popCalData = calPopupSetData(tmpDate,reloadCalPopup.arguments[1]);
 
	//Check to see if the window has been initialized, create it if it hasn't been
	if( popCalWin.toString() == "[object Object]" )
	{
		popCalWin = window.open("",reloadCalPopup.arguments[1],windowFeatures);
		popCalWin.opener = self;
		// Window im Vordergrund
		popCalWin.focus();
	}
	else 
	{
    popCalWin.document.close();
		popCalWin.document.clear();
  }
	
	//this is the line with the big problem
  popCalWin.document.write(popCalData);
	return void(1);
}
 
function calPopupSetData(firstDay,dstWindowName)
{
	var popCalData = "";
    var lastDate = 0;
	var fnt = new Array( "<FONT SIZE=\"2\">", "<B><FONT SIZE=\"2\">", "<FONT SIZE=\"2\" COLOR=\"Navy\"><B>");
	var dtToday = new Date();
	var thisMonth = firstDay.getMonth();
	var thisYear = firstDay.getFullYear();
	var nPrevMonth = (thisMonth == 0 ) ? 11 : (thisMonth - 1);
	var nNextMonth = (thisMonth == 11 ) ? 0 : (thisMonth + 1);
	var nPrevMonthYear = (nPrevMonth == 11) ? (thisYear - 1): thisYear;
	var nNextMonthYear = (nNextMonth == 0) ? (thisYear + 1): thisYear;
	var sToday = String((dtToday.getMonth()+1) + "/01/" + dtToday.getFullYear());
	var sPrevMonth = String((nPrevMonth+1) + "/01/" + nPrevMonthYear);
	var sNextMonth = String((nNextMonth+1) + "/01/" + nNextMonthYear);
	var sPrevYear1 = String((thisMonth+1) + "/01/" + (thisYear - 1));
	var sNextYear1 = String((thisMonth+1) + "/01/" + (thisYear + 1));
 	var tmpDate = new Date( sNextMonth );
	
	tmpDate = new Date( tmpDate.valueOf() - 1001 );
	lastDate = tmpDate.getDate();

	if (this.popCalMonths.split) // javascript 1.1 defensive code
	{
		var monthNames = this.popCalMonths.split(",");
		var dayNames = this.popCalDays.split(",");
	}
	else  // Need to build a js 1.0 split algorithm, default English for now
	{
		var monthNames = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
		var dayNames = new Array("Sun","Mon","Tue","Wed","Thu","Fri","Sat")
	}

 	var styles = "<style><!-- body{font-family:verdana;font-size:8pt}; td {  font-family: Verdana; font-size: 8pt; color: #666666}; A:link { color=navy;text-decoration: none;font-size:8pt };A:Visited { color=navy;text-decoration: none;font-size:8pt };A:Hover { color=red;text-decoration: none;font-size:8pt };TD.day { border-bottom: solid black; border-width: 0px; }--></style>"
	var cellAttribs = "align=\"center\" class=\"day\" BGCOLOR=\"#FFFFFF\" "
	var cellAttribs2 = "align=\"center\" BGCOLOR=\"#FFFFFF\" "
	var htmlHead = "<HTML><HEAD><TITLE>Calendar</TITLE>" + styles + "</HEAD><BODY BGCOLOR=\"#FFFFFF\" TEXT=\"#000000\">";
	var htmlTail = "</BODY></HTML>";
	var closeAnchor = "<CENTER><input type=button value=\"Close\" onClick=\"javascript:window.opener.closeCalPopup()\"></CENTER>";            
	var todayAnchor = "<A HREF=\"javascript:window.opener.reloadCalPopup('"+sToday+"','"+dstWindowName+"');\">Today</A>";
	var prevMonthAnchor = "<A HREF=\"javascript:window.opener.reloadCalPopup('"+sPrevMonth+"','"+dstWindowName+"');\">" + monthNames[nPrevMonth] + "</A>";
	var nextMonthAnchor = "<A HREF=\"javascript:window.opener.reloadCalPopup('"+sNextMonth+"','"+dstWindowName+"');\">" + monthNames[nNextMonth] + "</A>";
	var prevYear1Anchor = "<A HREF=\"javascript:window.opener.reloadCalPopup('"+sPrevYear1+"','"+dstWindowName+"');\">< "+(thisYear-1)+"</A>";
	var nextYear1Anchor = "<A HREF=\"javascript:window.opener.reloadCalPopup('"+sNextYear1+"','"+dstWindowName+"');\">"+(thisYear+1)+" ></A>";
		
	popCalData += (htmlHead + fnt[1]);
	popCalData += ("<DIV align=\"center\">");
	popCalData += ("<TABLE BORDER=\"0\" cellspacing=\"0\" callpadding=\"0\" width=\"280\"><TR><TD width=\"45\">&nbsp</TD>");
	popCalData += ("<TD width=\"45\" align=\"center\" " + cellAttribs2);
	popCalData += (" >");
	popCalData += (fnt[0]+prevYear1Anchor+"</FONT></TD>");
	popCalData += ("<TD width=\"70\" align=\"center\" "+cellAttribs2);
	popCalData += (" >");
	popCalData += (fnt[0]+todayAnchor+"</FONT></TD>");
	popCalData += ("<TD width=\"45\" align=\"center\" "+cellAttribs2);
	popCalData += (" >");
	popCalData += (fnt[0]+nextYear1Anchor+"</FONT></TD><TD width=\"45\">&nbsp</TD>");
	popCalData += ("</TR></TABLE>");
	popCalData += ("<TABLE BORDER=\"0\" cellspacing=\"0\" callpadding=\"0\" width=\"290\">");          
	popCalData += ("<TR><TD width=\"75\" align=\"center\" "+cellAttribs2);
	popCalData += (" >");
	popCalData += (fnt[0] + prevMonthAnchor + "</FONT></TD>");
	popCalData += ("<TD width=\"140\" align=\"center\">");
	popCalData += ("&nbsp;"+fnt[1]+"<FONT COLOR=\"#000000\" >" + monthNames[thisMonth] + ", " + thisYear + "&nbsp;</FONT></TD>");
	popCalData += ("<TD width=\"75\" align=\"center\" "+cellAttribs2);
	popCalData += (" >");
	popCalData += (fnt[0]+nextMonthAnchor+"</FONT></TD></TR></TABLE><BR>");       
	popCalData += ("<TABLE BORDER=\"0\" cellspacing=\"2\" cellpadding=\"1\"  width=\"245\">" );
	popCalData += ("");
	popCalData += ("<TR><TD width=\"35\" align=\"center\">"+fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[0]+"</FONT></TD><TD width=\"35\" align=\"center\">");
	popCalData += (fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[1]+"</FONT></TD><TD width=\"35\"align=\"center\">"+fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[2]+"</FONT></TD><TD width=\"35\"align=\"center\">");
	popCalData += (fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[3]+"</FONT></TD><TD width=\"35\"align=\"center\">"+fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[4]+"</FONT></TD><TD width=\"35\"align=\"center\">");
	popCalData += (fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[5]+"</FONT></TD><TD width=\"35\"align=\"center\">"+fnt[1]+"<FONT COLOR=\"#000000\">"+dayNames[6]+"</FONT></TD></TR>");
 
	var calDay = 0;
	var monthDate = 1;
	var weekDay = firstDay.getDay();
	do
	{
		popCalData += ("<TR>");
		for (calDay = 0; calDay < 7; calDay++ )
		{
			if((weekDay != calDay) || (monthDate > lastDate))
			{
				popCalData += ("<TD width=\"35\">"+fnt[1]+"&nbsp;</FONT></TD>");
				continue;
			}
			else
			{
				//anchorVal = "<A HREF=\"javascript:window.opener.calPopupSetDate(window.opener.popCalDstFld,'" + (thisMonth+1) + "/" + monthDate + "/" + thisYear + "');window.opener.closeCalPopup()\">";
				anchorVal = "<A HREF=\"javascript:void(0)\">";
				jsVal = "javascript:window.opener.calPopupSetDate(window.opener.popCalDstFld,'" + constructDate(monthDate,thisMonth+1,thisYear) + "');window.opener.closeCalPopup()";

				popCalData += ("<TD width=\"35\" "+cellAttribs+" onClick=\""+jsVal+"\">");
				
				if ((firstDay.getMonth() == dtToday.getMonth()) && (monthDate == dtToday.getDate()) && (thisYear == dtToday.getFullYear()) )
					popCalData += (anchorVal+fnt[2]+monthDate+"</A></FONT></TD>");
				else
					popCalData += (anchorVal+fnt[1]+monthDate+"</A></FONT></TD>");
				
				weekDay++;
				monthDate++;
			}
		}
		weekDay = 0;
	} while( monthDate <= lastDate );
	
	popCalData += ("</TABLE></DIV><BR>");
 
	popCalData += (closeAnchor+"</FONT>"+htmlTail);
	return( popCalData );
}
 
function calPopupSetDate()
{
    calPopupSetDate.arguments[0].value = calPopupSetDate.arguments[1];
}

// utility function
function padZero(num)
{
  return ((num <= 9) ? ("0" + num) : num);
}

// Format short date
function constructDate(d,m,y)
{
  var fmtDate = this.popCalDstFmt
  fmtDate = fmtDate.replace ('dd', padZero(d))
  fmtDate = fmtDate.replace ('d', d)
  fmtDate = fmtDate.replace ('MM', padZero(m))
  fmtDate = fmtDate.replace ('M', m)
  fmtDate = fmtDate.replace ('yyyy', y)
  fmtDate = fmtDate.replace ('yy', padZero(y%100))
  return fmtDate;
}

// ------------------------------------------------------------------
// Utility functions for parsing in getDateFromFormat()
// ------------------------------------------------------------------
function _isInteger(val) {
	var digits="1234567890";
	for (var i=0; i < val.length; i++) {
		if (digits.indexOf(val.charAt(i))==-1) { return false; }
		}
	return true;
	}
function _getInt(str,i,minlength,maxlength) {
	for (var x=maxlength; x>=minlength; x--) {
		var token=str.substring(i,i+x);
		if (token.length < minlength) { return null; }
		if (_isInteger(token)) { return token; }
		}
	return null;
	}
	
// ------------------------------------------------------------------
// getDateFromFormat( date_string , format_string )
//
// This function takes a date string and a format string. It matches
// If the date string matches the format string, it returns the 
// getTime() of the date. If it does not match, it returns 0.
// ------------------------------------------------------------------
function getDateFromFormat(val,format) {
	val=val+"";
	format=format+"";
	var i_val=0;
	var i_format=0;
	var c="";
	var token="";
	var x,y;
	var now=new Date();
	var year=now.getYear();
	var month=now.getMonth()+1;
	var date=1;
		
	while (i_format < format.length) {
		// Get next token from format string
		c=format.charAt(i_format);
		token="";
		while ((format.charAt(i_format)==c) && (i_format < format.length)) {
			token += format.charAt(i_format++);
			}
		// Extract contents of value based on format token
		if (token=="yyyy" || token=="yy" || token=="y") {
			if (token=="yyyy") { x=4;y=4; }
			if (token=="yy")   { x=2;y=2; }
			if (token=="y")    { x=2;y=4; }
			year=_getInt(val,i_val,x,y);
			if (year==null) { return 0; }
			i_val += year.length;
			if (year.length==2) {
				if (year > 70) { year=1900+(year-0); }
				else { year=2000+(year-0); }
				}
			}
		else if (token=="MM"||token=="M") {
			month=_getInt(val,i_val,token.length,2);
			if(month==null||(month<1)||(month>12)){return 0;}
			i_val+=month.length;}
		else if (token=="dd"||token=="d") {
			date=_getInt(val,i_val,token.length,2);
			if(date==null||(date<1)||(date>31)){return 0;}
			i_val+=date.length;}
		else {
			if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
			else {i_val+=token.length;}
			}
		}
	// If there are any trailing characters left in the value, it doesn't match
	if (i_val != val.length) { return 0; }
	// Is date valid for month?
	if (month==2) {
		// Check for leap year
		if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
			if (date > 29){ return 0; }
			}
		else { if (date > 28) { return 0; } }
		}
	if ((month==4)||(month==6)||(month==9)||(month==11)) {
		if (date > 30) { return 0; }
		}
	var newdate=new Date(year,month-1,date);
	return newdate;
	}

// ******************
// End Popup Calendar
// ******************

function trim(inputStr) 
{
	if (inputStr == null) { 
		return inputStr;
	}
	var strLTrimmedString="";
	for (var i = 0; i < inputStr.length; i++) {
		if (inputStr.substring(i, i + 1) != " ") {
			strLTrimmedString = inputStr.substring(i, inputStr.length);
			break;
		}
	}
	var strTrimmedString="";
	for (var i = strLTrimmedString.length; i > 0; i--) {
		if (strLTrimmedString.substring(i, i - 1) != " ") {
			strTrimmedString = strLTrimmedString.substring(0, i);
			break;
		}
	}
	return strTrimmedString;
}
function inRange(inputStr, lo, hi) {
	var num = parseInt(inputStr);
	if (num < lo || num > hi) {
		return false;
	}
	return true;
	}


// function to check if the date string has slashes in it and not dots (.) or dashes (-)
function hasSlash(strInput) {
	if ((strInput.indexOf("/") > 0) && (strInput.indexOf("-") <= 0) && (strInput.indexOf(".") <= 0)) {
		return true;
	} else {
		return false;
	}
}

// function to validate the month part of the date entry
function validateMonth(monthpart) {
	if (isEmpty(monthpart)) {
		return false;
	}
	if (!isNumeric(monthpart)) {
		return false;
	}
	if (!inRange(monthpart,1,12)) {
		return false;
	}
	return true;
}
function isEmpty(inputStr)
{
	if ((inputStr == "") || (inputStr == null)) 
		return true;
	else	
		return false;
}
// check for valid numeric strings
function isNumeric(strString)
{	
	var strValidChars = "0123456789.-";
	var strChar;
	var blnResult = true;
	for (i = 0; i < strString.length; i++)
	{
		strChar = strString.charAt(i);
		if (strValidChars.indexOf(strChar) == -1)
		{
			return false;
		}
	}
	return true;
} 
// function to validate the date part of the date entry
function validateDate(datepart, monthpart) {
	if (isEmpty(datepart)) {
		return false;
	}
	if (!isNumeric(datepart)) {
		return false;
	}
	var monthVal = parseInt(monthpart);
	var monthMax = new Array(31,31,29,31,30,31,30,31,31,30,31,30,31);
	var top = monthMax[monthVal];
	if (!inRange(datepart,1,top)) {
		return false;
	}
	return true;
}

// function to validate the year part of the date entry
function validateYear(yearpart) {
	if (isEmpty(yearpart)) {
		return false;
	}
	if (!isNumeric(yearpart)) {
		return false;
	}
	if (yearpart.length < 4) {
		return false;
	}
	return true;
}

// split date
function splitDate(origStr, splitType) {
	var remainingStr;
	var monthpart;
	var datepart;
	var yearpart;

	monthpart = origStr.substring(0, origStr.indexOf("/"));
	remainingStr = origStr.substring(origStr.indexOf("/") + 1, origStr.length);
	datepart = remainingStr.substring(0, remainingStr.indexOf("/"));
	yearpart = remainingStr.substring(remainingStr.indexOf("/") + 1, remainingStr.length);
	if (splitType == "m") {
		return stripZeros(monthpart);
	}
	else if (splitType == "d") {
		return stripZeros(datepart);
	}
	else if (splitType == "y") {
		return stripZeros(yearpart);
	}
}
function stripZeros(inputStr) {
	var result = inputStr;
	while (result.substring(0,1) == "0") {
		result = result.substring(1,result.length);
	}
	return result;
}
// check if its a date
function isDate(inputStr) {
	if (!hasSlash(inputStr)) {
		return false;
	}
	var datepart;
	var monthpart;
	var yearpart;
	monthpart = splitDate(inputStr, "m");
	datepart = splitDate(inputStr, "d");
	yearpart = splitDate(inputStr, "y");
	if(!validateMonth(monthpart)) {
		return false;
	}
	else if(!validateDate(datepart, monthpart)) {
		return false;
	}
	else if(!validateYear(yearpart)) {
		return false;
	}
	return true;
}

//format it if there is a missing leading zero in month or date part
function formatIt(strField) {
	if (parseInt(strField) <= 9) {
		strField = "0" + strField;
	}
	return strField;
}	

//compare dates
function firstIsGreaterThanSecond (firstDate, secondDate) {
	var compFirst = splitDate(firstDate, "y") + formatIt(splitDate(firstDate, "m")) + formatIt(splitDate(firstDate, "d"))
	var compSecond = splitDate(secondDate, "y") + formatIt(splitDate(secondDate, "m")) + formatIt(splitDate(secondDate, "d"))
	if (compFirst >= compSecond) {
		return true;
	}
	else {
		return false;
	}
}
//compare dates
function firstIsOnlyGreaterThanSecond (firstDate, secondDate) {
	var compFirst = splitDate(firstDate, "y") + formatIt(splitDate(firstDate, "m")) + formatIt(splitDate(firstDate, "d"))
	var compSecond = splitDate(secondDate, "y") + formatIt(splitDate(secondDate, "m")) + formatIt(splitDate(secondDate, "d"))
	if (compFirst > compSecond) 
	{		
		return true;
	}
	else {
		return false;
	}
}
//get the date in asked format
function getTodaysDate(strFormat) {
	var returnDate;
	var currDate = new Date();
	if (strFormat == "DD/MM/YYYY") {
		returnDate = formatIt(currDate.getDate()) + "/" + formatIt(currDate.getMonth()+ 1) + "/" + currDate.getFullYear();
	} else {
		returnDate = formatIt(currDate.getMonth()+ 1) + "/" + formatIt(currDate.getDate()) + "/" + currDate.getFullYear();
	}
	return returnDate;	
}