//Global variables
var winCal;
var dtToday=new Date();
var Cal;
var docCal;
var MonthName=["January", "February", "March", "April", "May", "June","July", 
	"August", "September", "October", "November", "December"];
var WeekDayName=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];	
var exDateTime;//Existing Date and Time

//Configurable parameters
var cnTop="200";//top coordinate of calendar window.
var cnLeft="500";//left coordinate of calendar window
var WindowTitle ="DateTime Picker";//Date Time Picker title.
var WeekChar=2;//number of character for week day. if 2 then Mo,Tu,We. if 3 then Mon,Tue,Wed.
var CellWidth=20;//Width of day cell.
var DateSeparator="/";//Date Separator, you can change it to "/" if you want.
var TimeMode=24;//default TimeMode value. 12 or 24

var ShowLongMonth	= true;			//Show long month name in Calendar header. example: "January".
var ShowMonthYear	= false;		//Show Month and Year in Calendar header.
var MonthYearColor	= "#333333";	//Font Color of Month and Year in Calendar header.
var WeekHeadColor	= "#FFFFFF";	//Background Color in Week header.
var SundayColor		= "#FFFFFF";	//Background color of Sunday.
var SaturdayColor	= "#FFFFFF";	//Background color of Saturday.
var WeekDayColor	= "#FFFFFF";	//Background color of weekdays.
var FontColor		= "#000000";	//color of font in Calendar day cell.
var TodayColor		= "#F0F0F0";	//Background color of today.
var SelDateColor	= "#CCCCCC";	//Backgrond color of selected date in textbox.
var YrSelColor		= "#333333";	//color of font of Year selector.
var ThemeBg			= "";			//Background image of Calendar window.
//end Configurable parameters
//end Global variable

function NewCal(pCtrl,pFormat,pShowTime,pTimeMode)
{
	Cal=new Calendar(dtToday);
	if ((pShowTime!=null) && (pShowTime))
	{
		Cal.ShowTime=true;
		if ((pTimeMode!=null) &&((pTimeMode=='12')||(pTimeMode=='24')))
		{
			TimeMode=pTimeMode;
		}		
	}	
	if (pCtrl!=null)
		Cal.Ctrl=pCtrl;
	if (pFormat!=null)
		Cal.Format=pFormat.toUpperCase();
	
	exDateTime=document.getElementById(pCtrl).value;
	if (exDateTime!="")//Parse Date String
	{
		var Sp1;//Index of Date Separator 1
		var Sp2;//Index of Date Separator 2 
		var tSp1;//Index of Time Separator 1
		var tSp1;//Index of Time Separator 2
		var strMonth;
		var strDate;
		var strYear;
		var intMonth;
		var YearPattern;
		var strHour;
		var strMinute;
		var strSecond;
		//parse month
		
		Sp1 = exDateTime.indexOf(DateSeparator,0)
		Sp2 = exDateTime.indexOf(DateSeparator,(parseInt(Sp1)+1));
		
		if ((Cal.Format.toUpperCase()=="DDMMYYYY") || (Cal.Format.toUpperCase()=="DDMMMYYYY"))
		{
			strMonth=exDateTime.substring(Sp1+1,Sp2);
			strDate=exDateTime.substring(0,Sp1);
		}
		else if ((Cal.Format.toUpperCase()=="MMDDYYYY") || (Cal.Format.toUpperCase()=="MMMDDYYYY"))
		{
			strMonth=exDateTime.substring(0,Sp1);
			strDate=exDateTime.substring(Sp1+1,Sp2);
		}
		else if ((Cal.Format.toUpperCase()=="YYYYMMDD") || (Cal.Format.toUpperCase()=="YYYYMMMDD"))
		{
			strMonth = exDateTime.substring(Sp1+1,Sp2);
			strDate = exDateTime.substring(Sp2+1,exDateTime.length);			
		}

		if (isNaN(strMonth))
			intMonth=Cal.GetMonthIndex(strMonth);
		else
			intMonth=parseInt(strMonth,10)-1;	
		if ((parseInt(intMonth,10)>=0) && (parseInt(intMonth,10)<12))
			Cal.Month=intMonth;
		//end parse month
		//parse Date
		if ((parseInt(strDate,10)<=Cal.GetMonDays()) && (parseInt(strDate,10)>=1))
			Cal.Date=strDate;
		//end parse Date
		//parse year
		strYear=exDateTime.substring(Sp2+1,Sp2+5);
		YearPattern=/^\d{4}$/;
		if (YearPattern.test(strYear))
			Cal.Year=parseInt(strYear,10);
		//end parse year
		//parse time
		if (Cal.ShowTime==true)
		{
			tSp1=exDateTime.indexOf(":",0)
			tSp2=exDateTime.indexOf(":",(parseInt(tSp1)+1));
			strHour=exDateTime.substring(tSp1,(tSp1)-2);
			Cal.SetHour(strHour);
			strMinute=exDateTime.substring(tSp1+1,tSp2);
			Cal.SetMinute(strMinute);
			strSecond=exDateTime.substring(tSp2+1,tSp2+3);
			Cal.SetSecond(strSecond);
		}	
	}
	
	docCal = document.getElementById("divCalender")
	RenderCal();
}

function RenderCal()
{
	var sFinalHTML="";
	var vCalHeader;
	var vCalData;
	var vCalTime;
	var i;
	var j;
	var SelectStr;
	var vDayCount=0;
	var vFirstDay;
	var wk=1;
	
	vCalHeader="<form name='Calendar'>";
	vCalHeader+="<table border=0 width='220' height='100' cellspacing=0 cellpadding=1 bgcolor=#FFFFFF class='calTable'>"

	//Month Selector
	vCalHeader+="<tr>\n<td colspan=7 valign=middle height=20 style=\"background:url('"+imageFolder+"header.jpg');\" class='tableHead'>"

	vCalHeader+="<div style=\"cursor:hand; cursor:pointer; float:left; padding-top:5px;\" onclick=\"document.getElementById('divMonth').style.display='block';\" >" + Cal.GetMonthName(ShowLongMonth) + "</div>";
	vCalHeader+="<div style=\"float:left;\"><img border=0 alt='>' src='"+imageFolder+"dn.jpg' onclick=\"document.getElementById('divMonth').style.display='block';\" style=\"cursor:hand; cursor:pointer;\"></div>"

	//Year selector
	vCalHeader+="<div style=\"float:right;\"><img border=0 alt='+' src='"+imageFolder+"plus.jpg' onclick=\"javascript:Cal.IncYear();RenderCal();\" style=\"cursor:hand; cursor:pointer;\"></div>"
	vCalHeader+="<div style=\"float:right; padding-top:5px;\">" + Cal.Year + "</div>"
	vCalHeader+="<div style=\"float:right;\"><img border=0 alt='-' src='"+imageFolder+"minus.jpg' onclick=\"javascript:Cal.DecYear();RenderCal();\" style=\"cursor:hand; cursor:pointer;\"></div>"

	vCalHeader+="</td>\n<td background='"+imageFolder+"header.jpg' align=right class='tableHead'>"
	vCalHeader+="<div class='closeButt' onclick='javascript:closeCal();' title='close'>x</div>\n</td>"

	//Calendar header shows Month and Year
	if (ShowMonthYear)
		vCalHeader+="<tr><td colspan='7'><font align='center' color='"+MonthYearColor+"'><b>"+Cal.GetMonthName(ShowLongMonth)+" "+Cal.Year+"</b></font></td></tr>\n";
	//Week day header
	vCalHeader+="<tr bgcolor="+WeekHeadColor+">";

	vCalHeader+="<td width=\"12%\" align=center style=\"color:#CCCCCC; border-bottom:1px solid #CCCCCC;\"><b>Wk</b></td>";
	for (i=0;i<7;i++)
	{
		vCalHeader+="<td align='center' style=\"border-bottom:1px solid #CCCCCC;\"><b>"+WeekDayName[i].substr(0,WeekChar)+"</b></td>";
	}
	vCalHeader+="</tr>";
	sFinalHTML = sFinalHTML + vCalHeader;

	//Calendar detail
	CalDate=new Date(Cal.Year,Cal.Month);
	CalDate.setDate(1);
	vFirstDay=CalDate.getDay();
	vCalData="<tr>\n<td align=right style=\"border-right:1px solid #CCCCCC; color:#CCCCCC;\">"+wk+"</td>";
	for (i=0;i<vFirstDay;i++)
	{
		vCalData=vCalData+GenCell();
		vDayCount=vDayCount+1;
	}
	for (j=1;j<=Cal.GetMonDays();j++)
	{
		var strCell;
		vDayCount=vDayCount+1;
		if ((j==dtToday.getDate())&&(Cal.Month==dtToday.getMonth())&&(Cal.Year==dtToday.getFullYear()))
			strCell=GenCell(j,true,TodayColor);//Highlight today's date
		else
		{
			if (j==Cal.Date)
			{
				strCell=GenCell(j,true,SelDateColor);
			}
			else
			{	 
				if (vDayCount%7==0)
					strCell=GenCell(j,false,SaturdayColor);
				else if ((vDayCount+6)%7==0)
					strCell=GenCell(j,false,SundayColor);
				else
					strCell=GenCell(j,null,WeekDayColor);
			}		
		}						
		vCalData=vCalData+strCell;

		if((vDayCount%7==0)&&(j<Cal.GetMonDays()))
		{
			wk++;
			vCalData=vCalData+"</tr>\n<tr>\n<td align=right style=\"border-right:1px solid #CCCCCC; color:#CCCCCC;\">"+wk+"</td>";
		}
	}
	sFinalHTML = sFinalHTML + vCalData;

	//Time picker
	if (Cal.ShowTime)
	{
		var showHour;
		showHour=Cal.getShowHour();		
		vCalTime="<tr>\n<td colspan='8' align='left' style='background:#CCCCCC'>Select Time: ";
		vCalTime+="";
		vCalTime+="<input class='i' type='text' name='hour' maxlength=2 size=1 style=\"WIDTH: 20px\" value="+showHour+" onchange=\"javascript:Cal.SetHour(this.value)\">";
		vCalTime+=":<input class='i' type='text' name='minute' maxlength=2 size=1 style=\"WIDTH: 20px\" value="+Cal.Minutes+" onchange=\"javascript:Cal.SetMinute(this.value)\">";
		vCalTime+="<!--:<input class='i' type='text' name='second' maxlength=2 size=1 style=\"WIDTH: 20px\" value="+Cal.Seconds+" onchange=\"javascript:Cal.SetSecond(this.value)\">-->";
		if (TimeMode==12)
		{
			var SelectAm =(parseInt(Cal.Hours,10)<12)? "Selected":"";
			var SelectPm =(parseInt(Cal.Hours,10)>=12)? "Selected":"";

			vCalTime+="<select class='i' name=\"ampm\" onchange=\"javascript:Cal.SetAmPm(this.options[this.selectedIndex].value);\">";
			vCalTime+="<option "+SelectAm+" value=\"AM\">AM</option>";
			vCalTime+="<option "+SelectPm+" value=\"PM\">PM<option>";
			vCalTime+="</select>";
		}	
		vCalTime+="\n</td>\n</tr>";

		sFinalHTML = sFinalHTML + vCalTime
	}	
	//end time picker
	
	sFinalHTML+="\n</table>\n";
	sFinalHTML+="<div id=\"divMonth\" style=\"position:absolute; top:25px; left:10px; display:none\">\n"

	sFinalHTML+="<select name=\"MonthSelector\" onChange=\"javascript:Cal.SwitchMth(this.selectedIndex);RenderCal();\" style='font-family:Trebuchet MS; font-size:11px; border:1px solid #CCCCCC;' size=6>\n";
	for (i=0;i<12;i++)
	{
		if (i==Cal.Month)
			SelectStr="Selected";
		else
			SelectStr="";	
		sFinalHTML+="<option "+SelectStr+" value >"+MonthName[i]+"</option>\n";
	}
	sFinalHTML+="</select>";
	sFinalHTML+="</div>";
	
	placeTip()
	docCal.innerHTML = sFinalHTML;
	docCal.style.display = "block";
}

function GenCell(pValue,pHighLight,pColor)//Generate table cell with value
{
	var PValue;
	var PCellStr;
	var vColor;
	var vHLstr1;//HighLight string
	var vHlstr2;
	var vTimeStr;
	
	if (pValue==null)
		PValue="";
	else
		PValue=pValue;
	
	if (pColor!=null)
		vColor="bgcolor=\""+pColor+"\"";
	else
		vColor="";	
	if ((pHighLight!=null)&&(pHighLight))
		{vHLstr1="#000000";vHLstr2="";}
	else
		{vHLstr1="#000000";vHLstr2="";}	
	
	if (Cal.ShowTime)
	{
//		vTimeStr="document.getElementById('"+Cal.Ctrl+"').value+=' '+"+"Cal.getShowHour()"+"+':'+"+"Cal.Minutes"+"+':'+"+"Cal.Seconds";
		vTimeStr="document.getElementById('"+Cal.Ctrl+"').value+=' '+"+"Cal.getShowHour()"+"+':'+"+"Cal.Minutes"
		if (TimeMode==12)
			vTimeStr+="+' '+Cal.AMorPM";
	}
	else
		vTimeStr="";		
	PCellStr="<td "+vColor+" width="+CellWidth+" align='right'><a href=\"javascript:document.getElementById('"+Cal.Ctrl+"').value='"+Cal.FormatDate(PValue)+"';"+vTimeStr+";closeCal();\" style='font-size:11px; color:"+vHLstr1+"; font-family:Arial; text-decoration:none;'>"+PValue+"</a>"+vHLstr2+"</td>";
	return PCellStr;
}

function Calendar(pDate,pCtrl)
{
	//Properties
	this.Date=pDate.getDate();//selected date
	this.Month=pDate.getMonth();//selected month number
	this.Year=pDate.getFullYear();//selected year in 4 digits
	this.Hours=pDate.getHours();	
	
	if (pDate.getMinutes()<10)
		this.Minutes="0"+pDate.getMinutes();
	else
		this.Minutes=pDate.getMinutes();
	
	if (pDate.getSeconds()<10)
		this.Seconds="0"+pDate.getSeconds();
	else		
		this.Seconds=pDate.getSeconds();
		
	this.MyWindow=winCal;
	this.Ctrl=pCtrl;
	this.Format="ddMMyyyy";
	this.Separator=DateSeparator;
	this.ShowTime=false;
	if (pDate.getHours()<12)
		this.AMorPM="AM";
	else
		this.AMorPM="PM";	
}

function GetMonthIndex(shortMonthName)
{
	for (i=0;i<12;i++)
	{
		if (MonthName[i].substring(0,3).toUpperCase()==shortMonthName.toUpperCase())
		{	return i;}
	}
}
Calendar.prototype.GetMonthIndex=GetMonthIndex;

function IncYear()
{	Cal.Year++;}
Calendar.prototype.IncYear=IncYear;

function DecYear()
{	Cal.Year--;}
Calendar.prototype.DecYear=DecYear;
	
function SwitchMth(intMth)
{	Cal.Month=intMth;}
Calendar.prototype.SwitchMth=SwitchMth;

function SetHour(intHour)
{	
	var MaxHour;
	var MinHour;
	if (TimeMode==24)
	{	MaxHour=23;MinHour=0}
	else if (TimeMode==12)
	{	MaxHour=12;MinHour=1}
	else
		alert("TimeMode can only be 12 or 24");		
	var HourExp=new RegExp("^\\d\\d$");
	if (HourExp.test(intHour) && (parseInt(intHour,10)<=MaxHour) && (parseInt(intHour,10)>=MinHour))
	{	
		if ((TimeMode==12) && (Cal.AMorPM=="PM"))
		{
			if (parseInt(intHour,10)==12)
				Cal.Hours=12;
			else	
				Cal.Hours=parseInt(intHour,10)+12;
		}	
		else if ((TimeMode==12) && (Cal.AMorPM=="AM"))
		{
			if (intHour==12)
				intHour-=12;
			Cal.Hours=parseInt(intHour,10);
		}
		else if (TimeMode==24)
			Cal.Hours=parseInt(intHour,10);	
	}
}
Calendar.prototype.SetHour=SetHour;

function SetMinute(intMin)
{
	var MinExp=new RegExp("^\\d\\d$");
	if (MinExp.test(intMin) && (intMin<60))
		Cal.Minutes=intMin;
}
Calendar.prototype.SetMinute=SetMinute;

function SetSecond(intSec)
{	
	var SecExp=new RegExp("^\\d\\d$");
	if (SecExp.test(intSec) && (intSec<60))
		Cal.Seconds=intSec;
}
Calendar.prototype.SetSecond=SetSecond;

function SetAmPm(pvalue)
{
	this.AMorPM=pvalue;
	if (pvalue=="PM")
	{
		this.Hours=(parseInt(this.Hours,10))+12;
		if (this.Hours==24)
			this.Hours=12;
	}	
	else if (pvalue=="AM")
		this.Hours-=12;	
}
Calendar.prototype.SetAmPm=SetAmPm;

function getShowHour()
{
	var finalHour;
    if (TimeMode==12)
    {
    	if (parseInt(this.Hours,10)==0)
		{
			this.AMorPM="AM";
			finalHour=parseInt(this.Hours,10)+12;	
		}
		else if (parseInt(this.Hours,10)==12)
		{
			this.AMorPM="PM";
			finalHour=12;
		}		
		else if (this.Hours>12)
		{
			this.AMorPM="PM";
			if ((this.Hours-12)<10)
				finalHour="0"+((parseInt(this.Hours,10))-12);
			else
				finalHour=parseInt(this.Hours,10)-12;	
		}
		else
		{
			this.AMorPM="AM";
			if (this.Hours<10)
				finalHour="0"+parseInt(this.Hours,10);
			else
				finalHour=this.Hours;	
		}
	}
	else if (TimeMode==24)
	{
		if (this.Hours<10)
			finalHour="0"+parseInt(this.Hours,10);
		else	
			finalHour=this.Hours;
	}	
	return finalHour;	
}				
Calendar.prototype.getShowHour=getShowHour;		

function GetMonthName(IsLong)
{
	var Month=MonthName[this.Month];
	if (IsLong)
		return Month;
	else
		return Month.substr(0,3);
}
Calendar.prototype.GetMonthName=GetMonthName;

function GetMonDays()//Get number of days in a month
{
	var DaysInMonth=[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
	if (this.IsLeapYear())
	{
		DaysInMonth[1]=29;
	}	
	return DaysInMonth[this.Month];	
}
Calendar.prototype.GetMonDays=GetMonDays;

function IsLeapYear()
{
	if ((this.Year%4)==0)
	{
		if ((this.Year%100==0) && (this.Year%400)!=0)
		{
			return false;
		}
		else
		{
			return true;
		}
	}
	else
	{
		return false;
	}
}
Calendar.prototype.IsLeapYear=IsLeapYear;

function FormatDate(pDate)
{
	if (this.Format.toUpperCase()=="DDMMYYYY")
		return (pDate+DateSeparator+(this.Month+1)+DateSeparator+this.Year);
	else if (this.Format.toUpperCase()=="DDMMMYYYY")
		return (pDate+DateSeparator+this.GetMonthName(false)+DateSeparator+this.Year);
	else if (this.Format.toUpperCase()=="MMDDYYYY")
		return ((this.Month+1)+DateSeparator+pDate+DateSeparator+this.Year);
	else if (this.Format.toUpperCase()=="MMMDDYYYY")
		return (this.GetMonthName(false)+DateSeparator+pDate+DateSeparator+this.Year);
	else if (this.Format.toUpperCase()=="YYYYMMMDD")
		return (this.Year+DateSeparator+this.GetMonthName(false)+DateSeparator+pDate);
	else if (this.Format.toUpperCase()=="YYYYMMDD")
		return (this.Year+DateSeparator+(this.Month+1)+DateSeparator+pDate);
	
}
function closeCal() {
	docCal.style.display = "none";
//	docCal.style.height = "100px";
//	docCal.style.width = "220px";
}

// JavaScript Document

var offsetxpoint=-100 //Customize x offset of tooltip
var offsetypoint= 12 //Customize y offset of tooltip
var ie=document.all
var ns6=document.getElementById && !document.all
var curX
var curY
var rightedge
var bottomedge
var leftedge

function getObj() {
	if (ie||ns6) {
	var docCal=document.all? document.all["divCalendar"] : document.getElementById? document.getElementById("divCalender") : ""
		if (!docCal) { 
		a = document.createElement("div");
		a.setAttribute("className","dC");
		a.setAttribute("id","divCalender");
		document.getElementsByTagName("body")[0].appendChild(a);
		}
	}
}

function ietruebody(){
	return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : 		document.body
}

function positiontip(e){
	if(!docCal) getObj();

	// Finding the cursor position
	curX=(ns6)?e.pageX : event.x+ietruebody().scrollLeft;
	curY=(ns6)?e.pageY : event.y+ietruebody().scrollTop;

	// Find out how close the mouse is to the corner of the window
	rightedge=ie&&!window.opera? ietruebody().clientWidth+ietruebody().scrollLeft : window.innerWidth
	bottomedge=ie&&!window.opera? ietruebody().clientHeight+ietruebody().scrollTop : window.innerHeight
	leftedge=(offsetxpoint<0)? offsetxpoint*(-1) : -1000

	if(docCal) placeTip();
}

function placeTip(){
	if(docCal.style.display=="block") return false;

	var widthNeeded = curX + docCal.offsetWidth + offsetxpoint;
	var heightNeeded= curY + docCal.offsetHeight + offsetypoint;

	//if the horizontal distance isn't enough to accomodate the width of the context menu
	if (rightedge<widthNeeded){
	//move the horizontal position of the menu to the left by it's width
	docCal.style.left=ie? curX-(docCal.offsetWidth+offsetxpoint)+"px" : 	window.pageXOffset+curX-docCal.offsetWidth+"px"
	} else {
	//position the horizontal position of the menu where the mouse is positioned
	docCal.style.left=curX+offsetxpoint+"px"
	}

	//same concept with the vertical position
	if (bottomedge<heightNeeded) {
	docCal.style.top= ie? curY- (docCal.offsetHeight+offsetypoint) +"px" : 	window.pageYOffset+curY-docCal.offsetHeight-offsetypoint+"px"
	} else {
	docCal.style.top=curY+offsetypoint+"px"	
	}

}

document.onmousemove=positiontip
Calendar.prototype.FormatDate=FormatDate;