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 MonthName=new Array("Януари", "Февруари", "Март", "Април", "Май", "Юни", "Юли", 
	"Август", "Септември", "Октомври", "Ноември", "Декември");
var WeekDayName=new Array("Понеделник","Вторник","Сряда","Четвъртък","Петък","Събота", "Неделя");	
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=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="invalid";//Background color of Sunday.
var SaturdayColor="invalid";//Background color of Saturday.
var WeekDayColor="valid";//Background color of weekdays.
var FontColor="#000000";//color of font in Calendar day cell.
var TodayColor="active";//Background color of today.
var SelDateColor="inactive";//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 NewCal(pCtrl,pFormat,parentNode, pShowTime,pTimeMode, pDateAfter, pDateBefore){
	$(document).unbind('click');
	OldCal=new Object;
	if(Cal)
		var OldCal=Cal;
	if(OldCal && OldCal.parentNode){
		OldCal.Close();	
		if(OldCal.parentNode==parentNode){
			return;
		}
	}
	var k=null;
	var b=null;
	if(pDateAfter!=undefined){
		if(pDateAfter=='afterToday'){
			k=new Date();
		}else{
			k=new Date();
			pDA=pDateAfter.split('.');
			k.setDate(pDA[0]);
			k.setMonth(pDA[1]-1);
			k.setFullYear(pDA[2]);
		}
	}
	if(pDateBefore!=undefined){
		if(pDateBefore=='beforeToday'){
			b=new Date();
		}else{
			b=new Date();
			pDB=pDateBefore.split('.');
			b.setDate(pDB[0]);
			b.setMonth(pDB[1]-1);
			b.setFullYear(pDB[2]);
		}
	}
	
	Cal=new Calendar(dtToday, null, k);
	Cal.parentNode=parentNode;
	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();
	
	Cal.dateAfter=k;
	Cal.dateBefore=b;
	
	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=document.createElement('div');
	$(winCal).addClass('calendarWrapper');
	winCal.id="cal"+pCtrl;
	winCal.style.display='none';
	parOff=$(parentNode).offset();
	winCal.style.top=parOff.top+10+'px';
	winCal.style.left=parOff.left+'px';
	document.body.appendChild(winCal);
	
	
	$("#cal"+pCtrl).fadeIn("slow", function(){
		$(document).click(function(e){
			if($(e.target).parents("#cal"+pCtrl).length==0)
				Cal.Close();
		});
	});
	docCal=document.getElementById("cal"+pCtrl);
	RenderCal("cal"+pCtrl);
}

function RenderCal(isdis){
	var vCalHeader;
	var vCalData;
	var vCalTime;
	var i;
	var j;
	var dateAfter;
	var dateBefore;
	var SelectStr;
	var vDayCount=0;
	var vFirstDay;
	var myStr='';
	
	vCalHeader="<div style=\"font-size: 1px;\"><img src=\"img/calendar/calendar_top.png\" width=\"159\"/></div><div class=\"calendar\"><div><table><caption><a class=\"prev\" href=\"javascript:Cal.DecYear();RenderCal()\">&lt;</a><span class=\"month\">";
	//months
	vCalHeader+="<select style=\"width: auto;\" name=\"MonthSelector\" onChange=\"javascript:Cal.SwitchMth(this.selectedIndex);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>";
	vCalHeader+="</span><span class=\"year\">";
	//year
	vCalHeader+="\n<input type=\"text\" value=\""+Cal.Year+"\" size=\"3\" style=\"width: auto\" onkeypress=\"javascript: if(checkEnter(event)){ Cal.SetYear(this.value); RenderCal(); return false;}\" onblur=\"javascript: Cal.SetYear(this.value); RenderCal();\" onChange=\"javascript: Cal.SetYear(this.value); RenderCal();\"/>\n";	
	vCalHeader+="</span><a class=\"next\" href=\"javascript:Cal.IncYear();RenderCal()\">&gt;</a></caption><thead>";

	//Calendar header shows Month and Year
// 	if (ShowMonthYear)
// 		vCalHeader+="<tr><td colspan='7'><font face='Verdana' size='2' align='center' color='"+MonthYearColor+"'><b>"+Cal.GetMonthName(ShowLongMonth)+" "+Cal.Year+"</b></font></td></tr>\n";
	//Week day header
	vCalHeader+="<thead><tr>";
	for (i=0;i<7;i++){
		vCalHeader+="<th>"+WeekDayName[i].substr(0,WeekChar)+"</th>";
	}
	vCalHeader+="</tr></thead>";	
	myStr+=vCalHeader;
	
	//Calendar detail
	CalDate=new Date(Cal.Year,Cal.Month);
	CalDate.setDate(1);
	vFirstDay=CalDate.getDay();
	vCalData="<tbody><tr>";
	vFirstDay--;
	if(vFirstDay<0)
		vFirstDay=6;
	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(Cal.dateAfter && (j<=Cal.dateAfter.getDate() && Cal.Month==Cal.dateAfter.getMonth() && Cal.Year==Cal.dateAfter.getFullYear()) || (Cal.Month<Cal.dateAfter.getMonth() && Cal.Year==Cal.dateAfter.getFullYear()) || (Cal.Year<Cal.dateAfter.getFullYear())){/*Cal.dateAfter*/
			strCell=GenCell('<span class="cal_inactiveDate">'+j+'</span>',false,SelDateColor);	
		}else if(Cal.dateBefore && (j>=Cal.dateBefore.getDate() && Cal.Month==Cal.dateBefore.getMonth() && Cal.Year==Cal.dateBefore.getFullYear()) || (Cal.Month>Cal.dateBefore.getMonth() && Cal.Year==Cal.dateBefore.getFullYear()) || (Cal.Year>Cal.dateBefore.getFullYear())){/*Cal.dateAfter*/
			strCell=GenCell('<span class="cal_inactiveDate">'+j+'</span>',false,SelDateColor);	
		}else{
			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,SundayColor);
					else if ((vDayCount+1)%7==0)
						strCell=GenCell(j,false,SaturdayColor);
					else
						strCell=GenCell(j,null,WeekDayColor);
				}
			}
		}
		vCalData=vCalData+strCell;

		if((vDayCount%7==0)&&(j<Cal.GetMonDays())){
			vCalData=vCalData+"</tr>\n<tr>";
		}
	}
	
	vCalData+='</tr></tbody>';
	myStr+=vCalData;
	
// 	Time picker
	if (Cal.ShowTime){
		var showHour;
		showHour=Cal.getShowHour();		
		vCalTime="<tfoot>\n<tr><th colspan='7' align='center'>";
		vCalTime+="<input type='text' name='hour' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+showHour+" onchange=\"javascript:Cal.SetHour(this.value)\">";
		vCalTime+=" : ";
		vCalTime+="<input type='text' name='minute' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+Cal.Minutes+" onchange=\"javascript:Cal.SetMinute(this.value)\">";
		vCalTime+=" : ";
		vCalTime+="<input type='text' name='second' maxlength=2 size=1 style=\"WIDTH: 22px\" 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 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<br clear='all'/></th>\n</tr></tfoot>";
		myStr+=vCalTime;
	}	
	//end time picker
	myStr+="\n</table></div></div><div style=\"font-size: 1px;\"><img src=\"img/calendar/calendar_bot.png\" width=\"159\"/></div>";
	docCal.innerHTML=myStr;
}

function Close(){
	$(document).unbind('click');
	Ctrl=this.Ctrl;
	$("#cal"+Ctrl).fadeOut("slow", function(){
		document.getElementById('cal'+Ctrl).parentNode.removeChild(document.getElementById('cal'+Ctrl));
	});
	this.parentNode='';
}

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=pColor;
	else
		vColor="valid";	
	if ((pHighLight!=null)&&(pHighLight))
		vColor='active';
	
	if (Cal.ShowTime)
	{
		vTimeStr="document.getElementById('"+Cal.Ctrl+"').value+=' '+"+"Cal.getShowHour()"+"+':'+"+"Cal.Minutes"+"+':'+"+"Cal.Seconds";
		if (TimeMode==12)
			vTimeStr+="+' '+Cal.AMorPM";
	}	
	else
		vTimeStr="";		
// 	PCellStr="<td class=\""+vColor+"\"><a href=\"javascript:document.getElementById('"+Cal.Ctrl+"').value='"+Cal.FormatDate(PValue)+"';"+vTimeStr+";Cal.Close();\">"+PValue+"</a></td>";
	if(PValue!='' && !isNaN(PValue)){
		PCellStr="<td class=\""+vColor+"\" onclick=\"javascript:document.getElementById('"+Cal.Ctrl+"').value='"+Cal.FormatDate(PValue)+"';"+vTimeStr+";Cal.Close();\" style=\"cursor: pointer;\">"+PValue+"</td>";
	}else{
			PCellStr="<td class=\""+vColor+"\">"+PValue+"</td>";
	}
// 	alert(PCellStr);
	return PCellStr;
}

function Calendar(pDate,pCtrl, pAfterDate, pBeforeDate)
{
	//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;
	this.parentNode;
	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 SetYear(Year)
{	Cal.Year=Year;}
Calendar.prototype.SetYear=SetYear;
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;
Calendar.prototype.Close=Close;

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;