//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 SelectAllDates=false;//Show All dates as selectable or just future dates?
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="#FFFF99";//Backgrond color of selected date in textbox.
var YrSelColor="#cc0033";//color of font of Year selector.
var ThemeBg="";//Background image of Calendar window.
//end Configurable parameters
//end Global variable

function popupCalendar(fieldId) {
	element = document.getElementById(fieldId);
	theDate = null;
	if (element.value != null && element.value.length > 5) {
		theDate = stringToDate(element.value);
	}
	if (theDate != null) {
		NewCal(fieldId,'ddmmyyyy',false,24,theDate,0,-1);
	} else {
		NewCal(fieldId,'ddmmyyyy',false,24,dtToday,0,-1);
	}
}

function NewCal(pCtrl,pFormat,pShowTime,pTimeMode,pDefaultDate,pDateOffset,pDateCount)
{
	Cal=new Calendar(pDefaultDate);
	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("","Calendar","toolbar=0,status=0,menubar=0,fullscreen=no,width=278,height=275,resizable=0,top="+cnTop+",left="+cnLeft);
	docCal=winCal.document;
	RenderCal();
}

function RenderCal()
{
	var vCalHeader;
	var vCalData;
	var vCalFooter;
	var vCalMonth;
	var vCalYear;
	var i;
	var j;
	var SelectStr;
	var vDayCount=0;
	var vFirstDay;
	var vLastMonth=-1;
	var vNextMonth=-1;
	var vLastMonthYear=-1;

	docCal.open();
	docCal.writeln('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">');
	docCal.writeln("<html><head><title>"+WindowTitle+"</title>");
	docCal.writeln('<link rel="stylesheet" href="http://www.studentflights.com.au/css/sf-calendar.css">');
	docCal.writeln("<script>var winMain=window.opener;</script>");
	docCal.writeln("</head><body><form name='Calendar'>");

	vCalHeader='<div id="Calendar">\n';
	//Month Selector
	vCalHeader+='    <div class="cal_header">\n';
	vCalHeader+='        <div class="cal_upperleft">&nbsp;</div>\n';
	vCalHeader+='            <div class="cal_header_content">\n';
	if ((SelectAllDates == true) || (Cal.Month>dtToday.getMonth()) || (Cal.Year>dtToday.getFullYear()))
		vCalHeader+='                <span class="cal_prev"><a href="javascript:winMain.Cal.DecMonth();winMain.RenderCal()"><img style="border: none" src="http://www.studentflights.com.au/images/calendar_previous.gif" alt="Previous Month" /></a></span>\n';
	vCalHeader+="                <select name=\"MonthSelector\" class=\"cal_monthselect\" onChange=\"javascript:winMain.Cal.SwitchMth(this.value);winMain.RenderCal();\">\n";
	for (i=0;i<12;i++)
	{
		if ( SelectAllDates == true ) {
			if (i==Cal.Month)
				SelectStr="Selected";
			else
				SelectStr="";	
			vCalHeader+="                    <option "+SelectStr+" value=\""+Cal.Year+"."+i+"\" >"+MonthName[i]+" "+Cal.Year+"</option>\n";
		} else {
			vCalMonth = dtToday.getMonth() + i;
			vCalYear = dtToday.getFullYear();
			if ( vCalMonth > 11 ) {
				++vCalYear;
				vCalMonth -= 12;
			}
			if (vCalMonth==Cal.Month)
				SelectStr="Selected";
			else
				SelectStr="";	
			vCalHeader+="                    <option "+SelectStr+" value=\""+vCalYear+"."+vCalMonth+"\" >"+MonthName[vCalMonth]+" "+vCalYear+"</option>\n";
		}
		
	}
	vCalHeader+='                </select>\n';
	vCalHeader+='                <span class="cal_next"><a href="javascript:winMain.Cal.IncMonth();winMain.RenderCal()"><img style="border: none" src="http://www.studentflights.com.au/images/calendar_next.gif" alt="Next Month" /></a></span>\n';
	vCalHeader+='            </div>\n';
	vCalHeader+='        <div class="cal_upperright">&nbsp;</div>\n';
	vCalHeader+='    </div>\n';
	//Week day header
	vCalHeader+='    <div class="cal_body">\n';
	vCalHeader+='        <div class="cal_day_header">\n';
	vCalHeader+='            <span class="cal_first_day_header">Sun</span>\n';
	vCalHeader+='            <span class="cal_middle_day_header">Mon</span>\n';
	vCalHeader+='            <span class="cal_middle_day_header">Tue</span>\n';
	vCalHeader+='            <span class="cal_middle_day_header">Wed</span>\n';
	vCalHeader+='            <span class="cal_middle_day_header">Thu</span>\n';
	vCalHeader+='            <span class="cal_middle_day_header">Fri</span>\n';
	vCalHeader+='            <span class="cal_last_day_header">Sat</span>\n';
	vCalHeader+='         </div>\n';
	docCal.write(vCalHeader);
	
	//Calendar detail
	CalDate=new Date(Cal.Year,Cal.Month);
	CalDate.setDate(1);
	vFirstDay=CalDate.getDay();
	vLastMonthYear=Cal.Year;
	vLastMonth = Cal.Month - 1;
	if ( vLastMonth == -1 ) {
		--vLastMonthYear;
		vLastMonth = 11;
	}
	vLastMonthDays=Cal.GetMonDays(vLastMonth,vLastMonthYear);
	vCalData='        <div class="cal_day_body">\n';
	j=vLastMonthDays-vFirstDay+1;
	for (i=0;i<vFirstDay;i++)
	{
		vCalData=vCalData+GenCell(j,false,false);
		vDayCount=vDayCount+1;
		j=j+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())&&(SelectAllDates == false))
			strCell=GenCell(j,false,false,true);
		else if ((j==dtToday.getDate())&&(Cal.Month==dtToday.getMonth())&&(Cal.Year==dtToday.getFullYear()))
			strCell=GenCell(j,true,true,true);
		else
		{
			if (vDayCount%7==0)
				strCell=GenCell(j,true,false,false);
			else if ((vDayCount+6)%7==0)
				strCell=GenCell(j,true,false,false);
			else
				strCell=GenCell(j,true,false,true);
		}						
		vCalData=vCalData+strCell;

	}
	for (i=0;i<(35-vDayCount);i++)
	{
		vCalData=vCalData+GenCell(i+1,false,false);
	}
	vCalData+='        </div>\n';
	vCalData+='        <div class="cal_footer">&nbsp;</div>\n';
	vCalData+='    </div>';
	docCal.writeln(vCalData);	

	docCal.writeln("</div>");
	docCal.writeln("</form>");
	docCal.writeln('<div class="cal_close"><a class="cal_close_link" href="javascript:window.close()">Close window</a></div>');
	docCal.writeln("</body></html>");
	docCal.close();
}

function GenCell(pValue,pThisMonth,pToday,pWeekDay)//Generate table cell with value
{
	var PCellStr;
	
	if (pThisMonth) {
		if (pWeekDay)
			PCellStr='            <div class="cal_inside_weekday" onMouseOver="this.className=\'cal_inside_weekday_hover\'" onMouseOut="this.className=\'cal_inside_weekday\'">'
		else
			PCellStr='            <div class="cal_inside_weekendday" onMouseOver="this.className=\'cal_inside_weekendday_hover\'" onMouseOut="this.className=\'cal_inside_weekendday\'">'
	} else {
		if (pWeekDay)
			PCellStr='            <div class="cal_outside_weekday">'
		else
			PCellStr='            <div class="cal_outside_weekendday">'
	}

	if (pToday)
		PCellStr+='<a class="cal_today" href="javascript:winMain.document.getElementById(\''+Cal.Ctrl+'\').value=\''+Cal.FormatDate(pValue)+'\';window.close();">'+pValue+'</a>';
	else if (pThisMonth)
		PCellStr+='<a class="cal_otherday" href="javascript:winMain.document.getElementById(\''+Cal.Ctrl+'\').value=\''+Cal.FormatDate(pValue)+'\';window.close();">'+pValue+'</a>';
	else
		PCellStr+=''+pValue;
	PCellStr+='</div>\n'
	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 IncMonth()
{	if ( ++Cal.Month==12 )
	 { IncYear();Cal.Month=0 }
}
Calendar.prototype.IncMonth=IncMonth;

function DecMonth()
{	if ( --Cal.Month==-1 )
	 { DecYear();Cal.Month=11 }
}
Calendar.prototype.DecMonth=DecMonth;
	
function SwitchMth(yearMth)
{
	var dSp1;
	var strYear;
	var strMth;

	dSp1=yearMth.indexOf(".",0)
	strYear=yearMth.substring(0, dSp1);
	strMth=yearMth.substring(dSp1+1);
	Cal.Year=parseInt(strYear);
	Cal.Month=parseInt(strMth);
}
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(pMonth,pYear)//Get number of days in a month
{
	var DaysInMonth=[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
	if (this.IsLeapYear(pYear))
	{
		DaysInMonth[1]=29;
	} else
	{
		DaysInMonth[1]=28;
	}
	if ( pMonth != null )
		return DaysInMonth[pMonth];	
	else
		return DaysInMonth[this.Month];	
}
Calendar.prototype.GetMonDays=GetMonDays;

function IsLeapYear(pYear)
{
	var checkYear=this.Year;

	if (pYear!=null)
		checkYear=pYear;
	if ((checkYear%4)==0)
	{
		if ((checkYear%100==0) && (checkYear%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)+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;