// This function is used to check if a certain text is numeric or not
function IsNumeric(sText) {
  var ValidChars = "0123456789.";
  var IsNumber=true;
  var Char;

  for (i = 0; i<sText.length && IsNumber == true; i++) {
    Char = sText.charAt(i);
    if (ValidChars.indexOf(Char) == -1) {
      IsNumber = false;
    }
  }
  return IsNumber;
}

//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-**-*-*-*-*-*-*-*-*-*-*-*
// Remove both the leading and the trailing space/s of a given string
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-**-*-*-*-*-*-*-*-*-*-*-*
function Trim(str) {
	// Remove leading spaces and carriage returns
  while (str.substring(0,1) == ' ') {
  	str = str.substring(1,str.length);
	}

	// Remove trailing spaces and carriage returns
  while (str.substring(str.length-1,str.length) == ' ') {
  	str = str.substring(0,str.length-1);
  }
  return str;
}

// This function is to be used in the show/hide row contents without img
function ShowHideRow(Row) {
  if (Row.style.display == '') {
    Row.style.display = 'none';
  }else{
    Row.style.display = '';
  }
}

/*-*-*-*-*-* This function is to be used in the show/hide row contents with img *-*-*-*-*-*/
function ToggleInfoRow(Row, Img) {
  if (Row.style.display == '') {
    Row.style.display = 'none';    
    Img.src = '../Images/arrowOffAr.gif';
  }else{
    Row.style.display = '';
		Img.src = '../Images/arrowOn.gif';
  }
}

function ShowHideBox(Row, Img) 
{	
  if (Row.style.display == '') {
    Row.style.display = 'none';    
    Img.src = '../Images/Icon_Plus.jpg';
  }else{
    Row.style.display = '';
		Img.src = '../Images/Icon_Minus.jpg';
  }
}

// This function is used to filter data of a certain combobox regarding those written on the textbox used for the filtration
function SelectObject( txt, cmb )
{
	
	var txtObj = document.getElementById(txt);
	var cmbObj = document.getElementById(cmb);
	for( var i=0;i<cmbObj.options.length;i++ )
	{
		if( cmbObj.options[i].text.indexOf( txtObj.value ) == 0 )
		{
			cmbObj.selectedIndex = i;			
			break;
		}
	}	
}

// This function is used to open a normal popup window
function openNewWindow(url,width,height) {
  var left =  Math.floor(screen.width/2)-Math.floor(width/2);
  var top =  Math.floor(screen.height/2)-Math.floor(height/2); 
	popwindow = window.open(url, "popwindow", "toolbar=no,width="+width+",height="+height+",top="+top+",left="+left);
	popwindow.focus();
}

// This function is used to open an advanced popup window with dynamic properties
function openAdvancedNewWindow(url, width, height, sAdditionalProperties) 
{
  var left =  Math.floor(screen.width/2)-Math.floor(width/2);
  var top =  Math.floor(screen.height/2)-Math.floor(height/2);
  
  var sProperties = "";
  
  sProperties  = "width="+width+",height="+height+",top="+top+",left="+left;
  sProperties += sAdditionalProperties;
  
	popwindow = window.open(url, "popwindow", sProperties);
	popwindow.focus();
}

// Those functions are used to calculate the days elapsed of absenteeism
function y2k(number) { return (number < 1000) ? number + 1900 : number; }

function daysElapsed(date1,date2) {
    var difference =
        Date.UTC(y2k(date1.getYear()),date1.getMonth(),date1.getDate(),0,0,0)
      - Date.UTC(y2k(date2.getYear()),date2.getMonth(),date2.getDate(),0,0,0);
    return difference/1000/60/60/24;
}

// This function is used in the login process
function login() {
  with (document.form) {
    if (txtUsername.value=="") {
      alert("");
    	txtUsername.focus();
   	  return false;
		}
    if (txtPassword.value=="") {
      alert("!");
      txtPassword.focus();
      return false;
		}
	  
  	useraction.value = "login";
    action = "login.php";
    submit();
	}
}

// This function is used to submit form when the user press enter
function submitEnter(myfield,myevent,myaction) {
  var keycode;
  if (window.event) keycode = window.event.keyCode;
  else if (myevent) keycode = myevent.which;
  else return true;
	//alert (keycode);
  if (keycode == 13) {
    if (myaction == "login") {
      login();    
    }else if (myaction == "search") {
      SearchForMaterials();    
    }else if (myaction == "NewsSearch") {
      SearchForNews();    
    }else if (myaction == "subscribe") {
      SubscribeMe();
    }else if (myaction == "unsubscribe") {
      SubscribeMe();
    }else{
      myfield.form.submit();
    }
    return false;
  }
  else
     return true;
}


// This function is used to check if a certain email is valid
function isValidMail(emailStr) {
  var checkTLD=1;
  var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
  var emailPat=/^(.+)@(.+)$/;
  var specialChars= "\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
  var validChars= "\[^\\s" + specialChars + "\]";
  var quotedUser="(\"[^\"]*\")";
  var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
  var atom=validChars + '+';
  var word="(" + atom + "|" + quotedUser + ")";
  var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
  var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
  var matchArray=emailStr.match(emailPat);
  if (matchArray==null) {
    alert("الرجاء التأكد من صحة البريد الألكتروني!!");
    return false;
  }
  var user=matchArray[1];
  var domain=matchArray[2];
  for (i=0; i<user.length; i++) {
    if (user.charCodeAt(i)>127) {
      alert("Your email address contains invalid characters.");
      return false;
     }
  }
  for (i=0; i<domain.length; i++) {
    if (domain.charCodeAt(i)>127) {
      alert("Your email domain name contains invalid characters.");
      return false;
     }
  }
  if (user.match(userPat)==null) {
    alert("الرجاء التأكد من صحة البريد الألكتروني!!");
    return false;
  }
  var IPArray=domain.match(ipDomainPat);
  if (IPArray!=null) {
    for (var i=1;i<=4;i++) {
      if (IPArray[i]>255) {
        alert("Destination IP address is invalid!");
        return false;
      }
    }
    return true;
  }
  var atomPat=new RegExp("^" + atom + "$");
  var domArr=domain.split(".");
  var len=domArr.length;
  for (i=0;i<len;i++) {
    if (domArr[i].search(atomPat)==-1) {
      alert("Your email address does not seem to be valid - check your spelling, including wrong use of commas, or a full point . at the end of the address.");
      return false;
     }
  }
  if (checkTLD && domArr[domArr.length-1].length!=2 &&
  domArr[domArr.length-1].search(knownDomsPat)==-1) {
    alert("Your email address must end in a well-known domain or two letter " + "country.");
    return false;
  }
  if (len<2) {
    alert("Your email address is missing a hostname - check spelling.");
    return false;
  }
  return true;
}

// This function is used to check if the email is valid or not
function checkEmail() {
  with (document.form) {
    if (txtEmail.value == "") {
      alert("الرجاء إدخال البريد الألكبروني!!!");
      txtEmail.focus();
      return false;
    }else if (txtEmail.value != "") {
      if (!isValidMail(txtEmail.value)) {
	      txtEmail.focus();
	      return;
	    }
    }
    return true;
  }
}

// This function is used to submit the form
function submitForm() {
  document.forms[0].submit();
}

function SubmitFormAction(sURL) 
{
	with (document.form)
	{
		action = sURL;
		submit();
	}
}

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                          Used for lists
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
function AddItem(List1,List2) {
  if (List1.options.selectedIndex>=0 && List1.options[0].value != "-1") 
  {    
		// Add the selected item of List1 in List2
    Element = new Option(List1.options[List1.options.selectedIndex].text,List1.options[List1.options.selectedIndex].value, false, true);
    if (List2.options[0].value != "-1") {
			List2.add(Element,List1.options[List1.options.selectedIndex].value); //List2.add(Element,List1.length);
		} else {
			List2.remove(0);
			List2.add(Element,0);
		}
			  
		// Remove the selected item of List1
		List1.remove(List1.options.selectedIndex);
    Element = new Option("----------------------------------------------","-1");
    if (List1.options.length == 0) {
			List1.add(Element,0);
		}
	}
}

function SwapLists(List1,List2) {
  if (List1.options.length>0 && List1.options[0].value != "-1") 
  {    
		// Add items of List1 in List2
    List2.remove(0);
    for(i=0;i<List1.options.length;i++) {
		  Element = new Option(List1.options[i].text,List1.options[i].value);
			List2.add(Element,List1.options[i].value); // List2.add(Element,i);
		}
		// Remove items of List1
		L = List1.options.length
    for(i=0;i<L;i++) {
			List1.remove(0);
		}
    Element = new Option("----------------------------------------------","-1");
		List1.add(Element,0);
	}
}

	function MultiDimensionalArray(iRows,iCols) 
	{ 
		var i; 
		var j; 
		var a = new Array(iRows); 
		for (i=0; i < iRows; i++) 
		{ 
		   a[i] = new Array(iCols); 
		   for (j=0; j < iCols; j++) 
		   { 
		       a[i][j] = ""; 
		   } 
		} 
	   return(a); 
	}
	
	//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-**-*-*-*-*-*-*-*-*-*-*-*
	function mySplit(whole, link) {
    if (whole.split) {
		  return(whole.split(link));
		}
    
 	  var parts = new makeArray(0);
 	  var d = 0;
 	  var p = 0;
 	  var q = whole.indexOf(link);

    while (q > -1) {
      parts[d++] = whole.substring(p, q);
    	parts.length = d;
    	p = q + 1;
    	q = whole.indexOf(link, p);
		}

    parts[d++] = whole.substring(p);
 	  parts.length = d;
	  return(parts);
	}
	
	//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-**-*-*-*-*-*-*-*-*-*-*-*
	function myJoin(parts, link) {
    if (parts.join) {
      return(parts.join(link));
    }

    var whole = "";
    var thisLink = "";

    for(var d = 0; d < parts.length;d++) {
      if (parts[d] != "") {
        whole = whole + thisLink + parts[d];
     		thisLink = link;
			}
		}
	  return(whole);
	}

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                          Newsletter Control
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
// This function is used to subscribe (1) or unsubscribe (0) a certain email address
function SubscribeMe() 
{
  var frm = document.forms[0];
  var email = frm.txtSubscriberEmail.value;
  if (email != "") {
    if (!isValidMail(email)) {
      frm.txtSubscriberEmail.focus();
    }else{
      if (frm.rdNewsletter[0].checked) frm.useraction.value = "subscribe";
      else frm.useraction.value = "unsubscribe";
      frm.action = "../Newsletter/subscribtion.php";
      frm.submit();
    }
  }else{
    return false;
  }
}

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                          Comment Article & Email Article
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/

//checks News Comments submitting

function CheckNewsComment()
{
	with (document.form)
	{
		if (Trim(txtName.value) == "") {
	    alert("الرجاء تزويد الإسم");
	    txtName.focus();
	    return false;
	  }

  	if(Trim(txtEmail.value) == "") {
    	alert("الرجاء تزويد العنوان الإلكتروني");
    	txtEmail.focus();
    	return false;
    }
    
    if (!isValidMail(txtEmail.value)) {	      
      txtEmail.focus();
      return false;
    }
	  
	  if(txtCommentTitle.value == "") {
		  alert("الرحاء تزويد عنوان التعليق");
		  txtCommentTitle.focus();
		  return false;
	  }
	  
	  if(txtComment.value == "") {
		  alert("الرحاء تزويد تفاصيل التعليق");
		  txtComment.focus();
		  return false;
	  }
	      
 		useraction.value = "PostComment";
  	submit();
	}
}

//checks Email Article popup before submitting

function CheckEmailContent()
{
	with (document.form)
	{
		if (Trim(txtVisitorName.value) == "") {
      alert("الرجاء تزويد الإسم");
      txtVisitorName.focus();
      return false;
	   }

		if(Trim(txtVisitorEmail.value) == "") {
    	alert("الرجاء تزويد العنوان الإلكتروني");
    	txtVisitorEmail.focus();
    	return false;
    }
    
    if (!isValidMail(txtVisitorEmail.value)) {
      txtVisitorEmail.focus();
      return false;
    }
    
    if (Trim(txtFriendName.value) == "") {
      alert("!الرجاء تزويد اسم صديقك");
      txtFriendName.focus();
      return false;
   	}
	   
    if(Trim(txtFriendEmail.value) == "") {
    	alert("الرجاء تزويد بريد صديقك!");
    	txtFriendEmail.focus();
    	return false;
    }
	    
   	if (!isValidMail(txtFriendEmail.value)) {	      
      txtFriendEmail.focus();
      return false;
    }
	    
	  if(txtComment.value == "") {
		  alert("الرجاء تزويد مضمون ملاحطتك.");
		  txtComment.focus();
		  return false;
	  }
	  
	  useraction.value = "SendEmail";
    submit();
	}
}

//check GuestBook Registration before submitting

function GuestBookRegisterCheck()
{
	with (document.form)
	{
		if (Trim(txtName.value) == "") {
      alert("الرجاء تزويد الإسم!");
      txtName.focus();
      return false;
	   }

		if(Trim(txtEmail.value) == "") {
    	alert("الرجاء تزويد البريد الإلكتروني");
    	txtEmail.focus();
    	return false;
    }
    
    if (!isValidMail(txtEmail.value)) {	      
      txtEmail.focus();
      return false;
    }
    
    if(Trim(txtTitle.value) == "") {
    	alert("الرجاء تزويد عنوان!");
    	txtTitle.focus();
    	return false;
    }
    
    if(Trim(txtNotes.value) == "") {
    	alert("الرجاء ادخال التعليق!");
    	txtTitle.focus();
    	return false;
    } 
		useraction.value = "RegisterGuestBook";	
		action = "../GuestBook/manage_guestbook.php"
    submit();
	}
}

//checks "Notify a Friend" popup before submitting

function CheckTellFriendContent()
{
	with (document.form)
	{
		if (Trim(txtVisitorName.value) == "") {
      alert("الرجاء تزويد الإسم");
      txtVisitorName.focus();
      return false;
	   }

		if(Trim(txtVisitorEmail.value) == "") {
    	alert("الرجاء تزويد العنوان الإلكتروني");
    	txtVisitorEmail.focus();
    	return false;
    }
    
    if (!isValidMail(txtVisitorEmail.value)) {
      txtVisitorEmail.focus();
      return false;
    }
    
    if (Trim(txtFriendName.value) == "") {
      alert("!الرجاء تزويد اسم صديقك");
      txtFriendEmail.focus();
      return false;
   	}
	   
    if(Trim(txtFriendEmail.value) == "") {
    	alert("الرجاء تزويد بريد صديقك!");
    	txtFriendEmail.focus();
    	return false;
    }
	    
   	if (!isValidMail(txtFriendEmail.value)) {	      
      txtFriendEmail.focus();
      return false;
    }
	    
	  if(txtComment.value == "") {
		  alert("الرجاء تزويد مضمون ملاحطتك.");
		  txtComment.focus();
		  return false;
	  }
	  
	useraction.value = "SendEmail";
    submit();
	}
}

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                         News Search Control
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
function SearchForNews() 
{
	with (document.form) 
	{
	  if (Trim(txtNewsSearch.value)=="") 
	  {
	  	return false;
	  }
	  
	  action = "../News/search_results.php?mode=simple";
	  submit();
	}
}
function SearchForNewsAdv() 
{
	with (document.form) 
	{
	  if (Trim(txtNewsSearch.value)=="") 
	  {
	  	return false;
	  }
	  
	  action = "../News/search_results.php?mode=simple";
	  submit();
	}
}
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                         News Search Control
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
function SearchForNews() 
{
	with (document.form) 
	{
		if (Trim(txtNewsSearch.value)=="") 
	  {
	  	return false;
	  }
	  else
	  {
			if(rdSearch[0].checked)	
			{
			 action = "../News/search_results.php?mode=simple";
			}
			else
			{
 			 action = "../News/search_results.php?mode=simple";
			}
			submit();
		}
	}
}
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*                         Materials Search Control
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
function SearchForMaterials() 
{
	with (document.form) 
	{		
	  if (Trim(txtSearch.value)=="") 
	  {
	  	return false;
	  }
	  
	  action = "../Home/search_results.php";
	  submit();
	}
}
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*			                         Calendar
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
function DisplayHijriDate(year, month, mday)
{
	arrDate = ConvertToHijri(year, month, mday);
	
	var lbl = document.getElementById('lblHijriDate');	
	lbl.innerHTML = arrDate[2] + " " + arrDate[4] +", " + arrDate[0];	
}
function ConvertToHijri(year, month, mday)
{
	//returns the Persian date in an array of the form (year, month, mday, wday, ymonth)
	
	var j;
	var weekday;
	var HIJRI_WEEKDAYS = new Array("الأحد", 
					"الإثنين", "الثلاثاء", 
					"الأربعاء", "الخميس",
					"الجمعة", "السبت");
			
	var HIJRI_MONTHS = new Array("محرم", 
					"صفر", "ربيع الأول", 
					"ربيع الثاني", "جمادى الأولى",
					"جمادى الثانية", "رجب",
					"شعبان", "رمضان",
					"شوال", "ذو القعدى",
					"ذو الحجة", "");
	
	   
   hour = min = sec = 0; 
   //alert('month: ' + eval(month)); 

   
   j = gregorian_to_jd(year, eval(month), mday) +
           (Math.floor(sec + 60 * (min + 60 * hour) + 0.5) / 86400.0);
         							  
    weekday = jwday(j);    
         							  
            
 	islcal = jd_to_islamic(j);
  //return new Array(islcal[0], islcal[1], islcal[2], HIJRI_WEEKDAYS[weekday], HIJRI_MONTHS[month-2]);
  return new Array(islcal[0], islcal[1], islcal[2], HIJRI_WEEKDAYS[weekday], HIJRI_MONTHS[islcal[1]-1]);
    
}

function jd_to_islamic(jd)
{
    var ISLAMIC_EPOCH = 1948439.5;
    
	var year, month, day;

    jd = Math.floor(jd) + 0.5;
    year = Math.floor(((30 * (jd - ISLAMIC_EPOCH)) + 10646) / 10631);
    month = Math.min(12,
                Math.ceil((jd - (29 + islamic_to_jd(year, 1, 1))) / 29.5) + 1);
    day = (jd - islamic_to_jd(year, month, 1)) + 1;   
    return new Array(year, month, day);
}

function islamic_to_jd(year, month, day)
{
	var ISLAMIC_EPOCH = 1948439.5;
    return (day +
            Math.ceil(29.5 * (month - 1)) +
            (year - 1) * 354 +
            Math.floor((3 + (11 * year)) / 30) +
            ISLAMIC_EPOCH) - 1;
}

function leap_islamic(year)
{
    return (((year * 11) + 14) % 30) < 11;
}

function DisplayPersianDate(year, month, mday)
{	
	arrDate = ConvertToPersian(year, month, mday);
	
	var lbl = document.getElementById('lblPersianDate');	
	//lbl.innerHTML = arrDate[3] + ", " + arrDate[2] + " " + arrDate[4] +", " + arrDate[0];
	lbl.innerHTML = "/ " + arrDate[2] + " " + arrDate[4] +", " + arrDate[0];
	
}
function ConvertToPersian(year, month, mday)
{
	//returns the Persian date in an array of the form (year, month, mday, wday, ymonth)
	
	var j;
	var weekday;
	var PERSIAN_WEEKDAYS = new Array("?کشنبه", 
					"دوشنبه", "سه شنبه", 
					"چهارشنبه", "پنجشنبه",
					"جمعه", "شنبه");
			
	var PERSIAN_MONTHS = new Array("فروردين", 
					"ارديبهشت", "خرداد", 
					"تير", "مرداد",
					"شهربور", "مهر",
					"آبان", "آذر",
					"دي", "بهمن",
					"اسفند", "");
	   
   hour = min = sec = 0;   
   j = gregorian_to_jd(year, eval(month), mday) +
           (Math.floor(sec + 60 * (min + 60 * hour) + 0.5) / 86400.0);
         							  
    weekday = jwday(j);    
         							  
            
  perscal = jd_to_persian(j);
    
 	// return new Array(perscal[0], perscal[1], perscal[2], PERSIAN_WEEKDAYS[weekday], PERSIAN_MONTHS[month-3]);
 	return new Array(perscal[0], perscal[1], perscal[2], PERSIAN_WEEKDAYS[weekday], PERSIAN_MONTHS[perscal[1]-1]);
    
}

// GREGORIAN_TO_JD  --  Determine Julian day number from Gregorian calendar date
var GREGORIAN_EPOCH = 1721425.5;
function gregorian_to_jd(year, month, day)
{
	year = eval(year);
	month = eval(month);
	day = eval(day);

    return (GREGORIAN_EPOCH - 1) +
           (365 * (year - 1)) +
           Math.floor((year - 1) / 4) +
           (-Math.floor((year - 1) / 100)) +
           Math.floor((year - 1) / 400) +
           Math.floor((((367 * month) - 362) / 12) +
           ((month <= 2) ? 0 :
                               (leap_gregorian(year) ? -1 : -2)
           ) +
           day);
}


//  JD_TO_PERSIAN  --  Calculate Persian date from Julian day
function jd_to_persian(jd)
{
	
    var year, month, day, depoch, cycle, cyear, ycycle,
        aux1, aux2, yday;


    jd = Math.floor(jd) + 0.5;

    depoch = jd - persian_to_jd(475, 1, 1);
    cycle = Math.floor(depoch / 1029983);
    cyear = mod(depoch, 1029983);
    if (cyear == 1029982) {
        ycycle = 2820;
    } else {
        aux1 = Math.floor(cyear / 366);
        aux2 = mod(cyear, 366);
        ycycle = Math.floor(((2134 * aux1) + (2816 * aux2) + 2815) / 1028522) +
                    aux1 + 1;
    }
    year = ycycle + (2820 * cycle) + 474;
    if (year <= 0) {
        year--;
    }
    yday = (jd - persian_to_jd(year, 1, 1)) + 1;
    month = (yday <= 186) ? Math.ceil(yday / 31) : Math.ceil((yday - 6) / 30);
    day = (jd - persian_to_jd(year, month, 1)) + 1;
    return new Array(year, month, day);
}

function leap_gregorian(year)
{
    return ((year % 4) == 0) &&
            (!(((year % 100) == 0) && ((year % 400) != 0)));
}
function persian_to_jd(year, month, day)
{
	var PERSIAN_EPOCH = 1948320.5;	 
  var epbase, epyear;
  

  epbase = year - ((year >= 0) ? 474 : 473);  
  epyear = 474 + mod(epbase, 2820); 
  return day +
          ((month <= 7) ?
              ((month - 1) * 31) :
              (((month - 1) * 30) + 6)
          ) +
          Math.floor(((epyear * 682) - 110) / 2816) +
          (epyear - 1) * 365 +
          Math.floor(epbase / 2820) * 1029983 +
          (PERSIAN_EPOCH - 1);
}
function mod(a, b)
{
    return a - (b * Math.floor(a / b));
}
function jwday(j)
{
    return mod(Math.floor((j + 1.5)), 7);
}

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