//Javascript name: My Date Time Picker
//Date created: 16-Nov-2003 23:19
//Scripter: TengYong Ng
//Website: http://www.rainforestnet.com
//Copyright (c) 2003 TengYong Ng
//FileName: DateTimePicker.js
//Version: 0.8
//Contact: contact@rainforestnet.com
// Note: Permission given to use this script in ANY kind of applications if
//       header lines are left unchanged.

//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 ="Calendar";//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=true;//Show Month and Year in Calendar header.
var MonthYearColor="#cc0033";//Font Color of Month and Year in Calendar header.
var WeekHeadColor="#0099CC";//Background Color in Week header.
var SundayColor="#6699FF";//Background color of Sunday.
var SaturdayColor="#CCCCFF";//Background color of Saturday.
var WeekDayColor="white";//Background color of weekdays.
var FontColor="blue";//color of font in Calendar day cell.
var TodayColor="#FFFF33";//Background color of today.
var SelDateColor="#5B94C6";//Backgrond color of selected date in textbox.
var YrSelColor="#cc0033";//color of font of Year selector.

//end Configurable parameters
//end Global variable
var strPrevValue="";



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);
		}
		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);
		}	
	}
	winCal=window.open("","DateTimePicker","toolbar=0,status=yes,menubar=0,fullscreen=no,width=195,height=260,resizable=0,top="+cnTop+",left="+cnLeft);
	winCal.focus();
	docCal=winCal.document;
	RenderCal();
}

function RenderCal()
{

	var vCalHeader;
	var vCalData;
	var vCalTime;
	var i;
	var j;
	var SelectStr;
	var vDayCount=0;
	var vFirstDay;
	
	docCal.open();
	docCal.writeln("<html><head><title>"+WindowTitle+"</title>");
	docCal.writeln("<script>"+
	               "var prevColor;"+
	               "function ShowColor(obj)"+
	               "{"+
						"obj.style.backgroundColor='#0562BE';"+
						"obj.style.color='#ffffff';"+
						"if(typeof prevColor!='undefined')"+
						"{"+
							"prevColor.style.backgroundColor='white';"+
							"prevColor.style.color='#000000';"+
						"}"+
						"prevColor=obj;"+
	               "}"+
	              
	               "var finalDate;var winMain=window.opener;function AddDate(pvalue){finalDate=pvalue;}"+
	               " function SetDate()"+
	               " {"+
	                   " if(typeof finalDate!='undefined')"+
	                  " {"+
	                    " winMain.document.getElementById('"+Cal.Ctrl+"').value=finalDate;"+
	                    " window.close();"+
	                  " }"+
						" else "+
						" { var strCurrValue=winMain.document.getElementById('"+Cal.Ctrl+"').value;"+
							" if(strCurrValue!='') "+
							" {	"+	
								" if("+Cal.Changed+"==true ) "+
								" { "+
								  " winMain.document.getElementById('"+Cal.Ctrl+"').value = '"+Cal.FormatDate(Cal.Date)+"'; "+
								  " window.close(); "+
								" } "+
								" else "+
								" { "+
								 "  window.close(); "+
								" } "+
							" } "+
							" else "+
							" { "+
								" winMain.document.getElementById('"+Cal.Ctrl+"').value = '"+Cal.FormatDate(Cal.IsToday)+"'; "+
								" window.close(); "+
							" } "+
	                   "} "+
	               " }</script>");
	              
	docCal.writeln("</head><body style='padding-top:0px;padding-left:0px;' link="+FontColor+" vlink="+FontColor+"><form name='Calendar'>");
	vCalHeader="<table align=left valign=top width=100%><tr><td align=left valign=top style='font-weight:bold;color:red;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:12px;'>Date order (MM/YYYY/DD)</td></tr><tr><td><table border=3 style=\"border-style:double;\" cellpadding=1 cellspacing=1 width='100%' align=\"left\" valign=\"top\">\n";
	//Month Selector
	vCalHeader+="<tr>\n<td colspan='7' align=left valign=top height="+CellWidth+" ><table border=0 width='100%' cellpadding=0 cellspacing=0><tr><td align='left'>\n";
	vCalHeader+="<select name=\"MonthSelector\" onChange=\"javascript:winMain.Cal.Changed=true;winMain.Cal.SwitchMth(this.selectedIndex);winMain.RenderCal();\">\n";
	for (i=0;i<12;i++)
	{
		if (i==Cal.Month)
			SelectStr="Selected";
		else
			SelectStr="";	
		vCalHeader+="<option "+SelectStr+" value >"+MonthName[i]+"\n";
	}
	vCalHeader+="</select></td>";
	//Year selector
	vCalHeader+="\n<td align='right' height="+CellWidth+" ><select id='year' onChange=\"javascript:winMain.Cal.Changed=true;winMain.Cal.showCal(this);winMain.RenderCal();\">";
	for(var i=1900; i<2099; i++)
		{
			//var optn = document.createElement("OPTION");
			//optn.text = i;
			//optn.value = i;
			//year.options.add(optn);
			
			if(Cal.Year == i)
			{
				vCalHeader+= "<option value='" + i + "' selected>"  + i + "</option>";	
			}
			else
			{
				vCalHeader+= "<option value='" + i + "'>"  + i + "</option>";	
			}
			
		}
	vCalHeader+="</select></td></tr></table></td>\n";	
	vCalHeader+="</tr>";			
		
//Calendar header shows Month and Year
	if (ShowMonthYear)
		vCalHeader+="<tr><td colspan='7' height="+CellWidth+" ><font face='Verdana' size='2' align='center' color='"+MonthYearColor+"'><b>"+Cal.GetMonthName(ShowLongMonth)+" "+Cal.Year+"</b></font></td></tr>\n";
	//Week day header
	vCalHeader+="<tr bgcolor="+WeekHeadColor+">";
	for (i=0;i<7;i++)
	{
		vCalHeader+="<td height="+CellWidth+" align='center'><font face='Verdana' size='2'>"+WeekDayName[i].substr(0,WeekChar)+"</font></td>";
	}
	vCalHeader+="</tr>";	
	docCal.write(vCalHeader);
	
	//Calendar detail
	CalDate=new Date(Cal.Year,Cal.Month);
	CalDate.setDate(1);
	vFirstDay=CalDate.getDay();
	vCalData="<tr>";
	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,WeekDayColor);
				else if ((vDayCount+6)%7==0)
					strCell=GenCell(j,false,WeekDayColor);
				else
					strCell=GenCell(j,null,WeekDayColor);
			}		
		}						
		vCalData=vCalData+strCell;

		if((vDayCount%7==0)&&(j<Cal.GetMonDays()))
		{
			vCalData=vCalData+"</tr>\n<tr>";
		}
		
	}
	docCal.writeln(vCalData);	
	//Time picker
	if (Cal.ShowTime)
	{
		var showHour;
		showHour=Cal.getShowHour();		
		vCalTime="<tr><td colspan='7' align='center'>";
		vCalTime+="<input type='text' name='hour' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+showHour+" onchange=\"javascript:winMain.Cal.SetHour(this.value)\">";
		vCalTime+=" : ";
		vCalTime+="<input type='text' name='minute' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+Cal.Minutes+" onchange=\"javascript:winMain.Cal.SetMinute(this.value)\">";
		vCalTime+=" : ";
		vCalTime+="<input type='text' name='second' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+Cal.Seconds+" onchange=\"javascript:winMain.Cal.SetSecond(this.value)\">";
		if (TimeMode==12)
		{
			var SelectAm =(parseInt(Cal.Hours,10)<12)? "Selected":"";
			var SelectPm =(parseInt(Cal.Hours,10)>=12)? "Selected":"";

			
		}	
		vCalTime+="</td></tr>";
		docCal.write(vCalTime);
	}	
	//end time picker
	docCal.writeln("\n</table>\n</td></tr><tr><td><table><tr><td><input type=\"button\" value=\"Ok\" onclick=\"SetDate();\"></td><td><input type=\"button\" value=\"Close\" onclick=\"javascript:window.close();\"></td></tr></table></td></tr></table>");
	docCal.writeln("</form></body></html>");
	docCal.close();
}




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="blue";	
	if ((pHighLight!=null)&&(pHighLight))
		{vHLstr1="color='red'><b>";vHLstr2="</b>";}
	else
		{vHLstr1=">";vHLstr2="";}	
	
	if (Cal.ShowTime)
	{
		vTimeStr="winMain.document.getElementById('"+Cal.Ctrl+"').value+=' '+"+"winMain.Cal.getShowHour()"+"+':'+"+"winMain.Cal.Minutes"+"+':'+"+"winMain.Cal.Seconds";
		if (TimeMode==12)
			vTimeStr+="+' '+winMain.Cal.AMorPM";
	}	
	else
		vTimeStr="";		
		
	if(pColor==TodayColor)
	{
		Cal.IsToday = PValue;
		
		PCellStr="<td height="+CellWidth+" "+vColor+" width="+CellWidth+" align='center'><font face='verdana' size='2'"+vHLstr1+"<a href=javascript:AddDate('"+Cal.FormatDate(PValue)+"'); onclick=\"javascript:ShowColor(this)\" style=\"text-decoration:none;color:black;\">"+PValue+"</a>"+vHLstr2+"</font></td>";
	}
	else
	{
		
	
		PCellStr="<td height="+CellWidth+" "+vColor+" width="+CellWidth+" align='center'><font face='verdana' size='2'"+vHLstr1+"<a href=javascript:AddDate('"+Cal.FormatDate(PValue)+"'); onclick=\"javascript:ShowColor(this)\" style=\"text-decoration:none;color:black;\">"+PValue+"</a>"+vHLstr2+"</font></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();	
	TodayDate = new Date();
	this.Changed=false;
	this.IsToday = TodayDate.getDate();
	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--;}

function showCal(obj)
{
	Cal.Year = obj.value;
	
}
Calendar.prototype.showCal=showCal;
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);			
}
Calendar.prototype.FormatDate=FormatDate;