function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function getAraMonthName(num)
{
	var AraName="";
	switch(parseInt(num,10))
	{
		case 1:AraName = "يناير";
		break;
		case 2:AraName = "فبراير";
		break;
		case 3:AraName = "مارس";
		break;
		case 4:AraName = "ابريل";
		break;
		case 5:AraName = "مايو";
		break;
		case 6:AraName = "يونيو";
		break;
		case 7:AraName = "يوليو";
		break;
		case 8:AraName = "أغسطس";
		break;
		case 9:AraName = "سبتمبر";
		break;
		case 10:AraName = "أكتوبر";
		break;
		case 11:AraName = "نوفمبر";
		break;
		case 12:AraName = "ديسمبر";
		break;
	}
	var Monthname = document.getElementById("Monthname");
	Monthname.innerHTML = AraName + " " + date.getFullYear();
}




/*
function getThisDayOffset(theDay)
{
	switch (theDay)
	{
		case "Saturday":return 1;
		break;
		case "Sunday":return 2
		break;
		case "Monday":return 3
		break;
		case "Tuesday":return 4;
		break;
		case "Wednesday":return 5;
		break;
		case "Thursday":return 6;
		break;
		case "Friday":return 7;
		break;
	}
}
*/



function getThisMonthTop(Month,year)
{
    //alert("Month: " + Month);
    //alert("year: " + year);
    
	if(Month==2)
	{
		if(year%4==0)
			return 29;
			return 28;
	}
	switch(Month)
	{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
		    return 31;
		break;
		
		case 4:
		case 6:
		case 9:
		case 11:
		    return 30;
		break;	
	}
}


function generateHeader()
{
	var strHTML = "";
	strHTML = strHTML + "<tr>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>سبت</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>احد</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>اثنين</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>ثلاثاء</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>اربعاء</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>خميس</td>";
	strHTML = strHTML + "<td style='padding:8px;' align='center'>جمعة</td>";
	strHTML = strHTML + "</tr>";
	return strHTML;
}


var jump=-99;
var RemainDays=0;
var isMoved=0;
var GlobalPrefix;
var GlobalRedCount;
var emptyDays = 0;

var intYear =0;
var intMonth = 0;
var intDay = 0;
     
var intPeriod = 0;
var intLength = 0;

var strFirstDay;
var CtrlTxtEvery;
var CtrlTxtNumberOfDays;
      
function Move(direction)
{
	RemainDays = intLength - GlobalRedCount;
	if((parseInt(intMonth,10) + parseInt(direction,10)) > 12)
    {
        intMonth =1;
        intYear +=1 ;
    }else if((parseInt(intMonth,10) + parseInt(direction,10)) < 1)
    {
        intMonth =12;
        intYear -=1 ;
    }else{
	    intMonth = parseInt(intMonth,10) + parseInt(direction,10);
	}
	
	isMoved=1;
	jump=0;
	GetPeriod();
}
      
function PrepareData(CtrlDdlYearID, CtrlDdlMonthID, CtrlDdlDayID, CtrlTxtEveryID, CtrlTxtNumberOfDaysID)
{
	
	GlobalPrefix = "";/*Prefix;*/
	
	jump=-99;
	
	//var 
	strFirstDay = document.getElementById(CtrlDdlMonthID).value + "/" + document.getElementById(CtrlDdlDayID).value + "/" + document.getElementById(CtrlDdlYearID).value;
	
	 if(! isDate(strFirstDay))
    {
        showMessage("الرجاء إدخال تاريخ صحيح");
        return false;
    }
    
    //var 
    CtrlTxtEvery = CtrlTxtEveryID;
    var varTemp;
    
    try
    { 
	    CtrlTxtEvery = document.getElementById(CtrlTxtEveryID);
	    varTemp = CtrlTxtEvery.value;
	}catch(err1)
	{
	    CtrlTxtEvery = CtrlTxtEveryID;
	}
	
	//var 
	CtrlTxtNumberOfDays = document.getElementById(CtrlTxtNumberOfDaysID);
	try
    { 
	    CtrlTxtNumberOfDays = document.getElementById(CtrlTxtNumberOfDaysID);
	    varTemp = CtrlTxtNumberOfDays.value;
	}catch(err1)
	{
	    CtrlTxtNumberOfDays = CtrlTxtNumberOfDaysID;
	}
	
	if(!isInteger(CtrlTxtEvery.value) || CtrlTxtEvery.value=="")
    {
        showMessage("خطاء في حقل &quot;تأتيك الدورة الشهرية كل&quot;");
        return false;
    }
    
     if(! isInteger(CtrlTxtNumberOfDays.value) || CtrlTxtNumberOfDays.value=="")
    {
        showMessage("خطاء في حقل &quot;عدد الايام التى تدوم فيها دورتك الشهرية&quot;");
        return false;
    }
    
	
	 intYear = GetYear(strFirstDay);
      intMonth = GetMonth(strFirstDay);
      intDay = GetDay(strFirstDay);
     
      intPeriod = CtrlTxtEvery.value;
      intLength = CtrlTxtNumberOfDays.value;
   
   
  
    
	GetPeriod(strFirstDay, CtrlTxtEvery, CtrlTxtNumberOfDays);
	
	var resultDiv = document.getElementById("spanResultDiv");
	resultDiv.style.display="block";
	
	return true;
}


var date = new Date();

function GetPeriod()
{  
   
	date.setDate(1);
	date.setFullYear(intYear);
	date.setMonth(intMonth - 1);
	getAraMonthName(intMonth);
	
	var dateStr = new String("");
	var offSet= parseInt(date.getDay()) + 1;
	var monthTop = getThisMonthTop(intMonth,intYear);
	
	//alert("monthTop: " + monthTop);
	
	date.setDate(intDay);
	if(jump==-99)
		jump=intDay;
	else
		{
			if(emptyDays>0)
			{
				jump=parseInt(intPeriod,10) - emptyDays-parseInt(intLength,10);
				isMoved=0;
			}
			else
			jump=parseInt(intPeriod,10) - GlobalRedCount;
		}
	var theHtml="";
	var daysCounter=1;
	var DaysDiv = document.getElementById("theDays");
	theHtml = "<table border='1' class='txt11 witcolor' cellpadding='5' clearing periodcalendar' style='BORDER-COLLAPSE:collapse; background-color:#FFFFFF;' width='100%'>";
	theHtml = theHtml + generateHeader();
	var yellowCount=0;
	var redCount=0;
	var lengthCount=0;
	var looper=0;
	var remainsCount=0;
	
for(var j=1;daysCounter<=monthTop;j++)
{
	theHtml = theHtml + "<tr>";
	for(var i=1;i<=7 && daysCounter<=monthTop;i++)
	{
		theHtml = theHtml + "<td style='padding:8px;'  align='center'>";
		if((i+(7*(j-1)))>=offSet)
		{
			if(isMoved==1 && remainsCount<RemainDays)
			{
				if(remainsCount<RemainDays)
				{
					remainsCount=remainsCount+1;
					theHtml = theHtml + "<img src='images/periodredflower.gif' style='cursor:pointer;' alt='" + daysCounter + "'><br /><b style='color:#F95C63;'>" + daysCounter  + "</b>";
				}
				else
				isMoved=0;
				
			}
			else		
				if(daysCounter>=parseInt(jump,10)+(looper*(parseInt(intPeriod,10)-1)) && redCount<intLength)
				{
					redCount=redCount+1;
					emptyDays=0;
					theHtml = theHtml + "<img src='images/periodredflower.gif' style='cursor:pointer;' alt='" + daysCounter + "' title='" + daysCounter + "'><br /><b style='color:#F95C63;'>" + daysCounter  + "</b>";
				}
				else
				{
					if(daysCounter+3>=parseInt(jump,10)+(looper*(parseInt(intPeriod,10)-1)) && yellowCount<3 && daysCounter<parseInt(jump,10)+(looper*(parseInt(intPeriod,10)-1)))
					{
						yellowCount=yellowCount+1;
						theHtml = theHtml + "<img src='images/periodyellowflower.gif' style='cursor:pointer;' alt='" + daysCounter + "' title='" + daysCounter + "'><br /><b style='color:#F8BA34;' >" + daysCounter  + "</b>";
					}
					else
					{
						emptyDays = emptyDays + 1;
						theHtml = theHtml + daysCounter;
					}
				}
				daysCounter = daysCounter + 1;	
		}
		theHtml = theHtml + "</td>";	
		
	}
	if(redCount == intLength)
	{
		redCount = 0;
		yellowCount = 0;
		looper = looper + 1;
	}
	theHtml = theHtml + "</tr>";
}
theHtml = theHtml + "</table>";
jump=-99;
isMoved=0;
GlobalRedCount = redCount;
DaysDiv.innerHTML = theHtml;
return false;
}

var dtCh= "/";
var minYear=1900;
var maxYear=2100;



function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}


function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strMonth=dtStr.substring(0,pos1);
	var strDay=dtStr.substring(pos1+1,pos2);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1);
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1);
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1);
	}
	month=parseInt(strMonth);
	day=parseInt(strDay);
	year=parseInt(strYr);
	
	if (pos1==-1 || pos2==-1){
		//alert("The date format should be : mm/dd/yyyy")
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Please enter a valid month")
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Please enter a valid day")
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Please enter a valid date")
		return false;
	}
return true;
}

function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}


function GetYear(dtStr)
{
    var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	var year =0;
	year=parseInt(strYr);
	
	return year;
}


function GetMonth(dtStr)
{
    var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strMonth=dtStr.substring(0,pos1);
		
	if (strMonth.charAt(0)=="0" && strMonth.length>1)
	 strMonth=strMonth.substring(1);	
	
	var month =0;
	 
	month=parseInt(strMonth);
	
	return month;
	
}


function GetDay(dtStr)
{    
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strDay=dtStr.substring(pos1+1,pos2);
    var day =0;
    
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	 day = parseInt(strDay);
	
	return day;
	
}