/*
	Modified By		: Balamurugan.N
	Last Modified Date	: 	Mar 1 2006
	Modification 		:
		- added following functions
			*chkYear->year should be 4 digits
			*isDate ->date should be in the dd/mm/yyyy format
			*chkDate ->date should be greater than or equal to the current date	

*/
	var dt = new Date();
	var dt1;
	var dd = dt.getDate()
	var mm = (dt.getMonth())+1
	var yy = dt.getFullYear()

  /*
	Function Name	: chkYear
	Purpose			: used to check whether the give date's year is 4 digit or not.
	Arguments		: user entry date
	Returns			: if (error) then 
						 return 1
					  if no error then
						return 0
  */
  function chkYear(v1)
  {
     dt1 = v1.split("/")     
     var dd1 = dt1[0]
     var mm1 = dt1[1]
     var yy1 = dt1[2]
     if (yy1.length < 4 )		
		return 1;
	else
		return 0;
  }	
  
  /*
	Function Name	: chkDate
	Purpose			: used to check wheter the data is greater than or equal to the current date or not
	Arguments		: user entry date
	Returns			: if (error) then 
						 return 1
					  if no error then
						return 0
  */
  function chkDate(v)
  {
     dt1 = v.split("/")     
     var dd1 = dt1[0]
     var mm1 = dt1[1]
     var yy1 = dt1[2]

	if (yy1 < yy)
	{
		return 1
	}
	else if (yy1 == yy)
	{
		if ( mm1 < mm)
			return 1;
		else
		{
			if (dd1 < dd) 
				return 1;
			else
				return 0;  
		}
	}
	else
	{		
		return 0;
	}	
  
   }
  
/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
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 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 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 isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)

	//  date format is dd/mm/yyyy
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	
	var strYear=dtStr.substring(pos2+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 : dd/mm/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 chkNumeric(strString)
   {
		var strChar,dotPos,dotPosLast;
	    var strValidChars = "0123456789.,";
		var i=0;
		do
		{					
			    strChar = strString.charAt(i);
//						alert(strChar)
			    if (strValidChars.indexOf(strChar) == -1)			         
				         return false;			  
//				         alert(strValidChars.indexOf(strChar))       

				i = i + 1
		} while (i <strString.length)
	
		dotPos= strString.indexOf('.'); 
		dotPosLast=  strString.lastIndexOf('.');
		if ( dotPos != -1 && dotPosLast != -1 && dotPos!= dotPosLast)
				return false;
		else
				return true;	
   }
 function chkPhoneNumber(strString)
   {
		var strChar;
	    var strValidChars = "0123456789+- "; // Valid Chars : digits,+,- and space
		var i=0;
		do
		{					
			    strChar = strString.charAt(i);
			    if (strValidChars.indexOf(strChar) == -1)			         
				         return false;			         
				i = i + 1
		} while (i <strString.length)
	
		return true;	
   }

 function chkString(strString)
   {
		var f1;
		var i=0;
		do
		{
			f1 = strString.charCodeAt(i);
			i = i + 1			
			if ( (f1<32) || (f1>32 && f1 < 65) || (f1>90 && f1<97) || (f1>122 && f1<255) )
			{	return false;}
		} while (i <strString.length)
	
		return true;	
   }
    function checkEmail(xField)
	{
		var check, atPos, dotPos,atPosLast, strLen, cut1, cut2, cut3;
	    strLen	=	xField.length;
		atPos	=	xField.indexOf("@");
		atPosLast	=	xField.indexOf("@",atPos+1)
		dotPos	=	xField.indexOf(".");	
		dotPosLast	=	xField.indexOf(".",dotPos+1)
		cut1	=	xField.slice(0,atPos);
		cut2	=	xField.slice(atPos +1,dotPos );
		cut3	=	xField.slice(dotPos+1,strLen);
		//ix = cut3.indexOf(",");

		check = true;
//alert(xField.indexOf("@",atPos+1))
		if ( atPos < 1 )
		{
			check = false;
		}
		else if ( atPos == -1 || dotPos == -1 )
		{
			check = false;
//			alert('@/.')
		}	
		else if (  atPosLast != -1 )
		{
			check = false;
		}	
		else if ( dotPosLast == dotPos +1)
		{
			check = false;
		}				
		else if ( xField.charAt(strLen-1) == ".")
		{
			check = false;
		}				
		else if ( !(chkString(xField.charAt(0)))  ) //(!chkNumeric(cut2))(!chkNumeric(cut3))
		{
				check=false;
		}
		else if (!chkSpecial(xField) )
		{
				check=false;
		}
		else if (atPos == strLen-1 || dotPos == strLen-1) 
		{
				check=false;
				alert('Last')
		}
				

	return check;

	}

//Function for Check Special Characters	

function chkSpecial(strString)
   {
		var strChar;
	    var strValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_.@1234567890 ";  // Valid Chars : digits,+,- and space
		var i=0;
		do
		{					
			    strChar = strString.charAt(i);
			    if (strValidChars.indexOf(strChar) == -1)			         
				         return false;			         
				i = i + 1
		} while (i <strString.length)
	
		return true;	
   }


// FUNCTION FOR FINDING BLANK SPACE 
	function spaceCheck(xField)
	{
		var check, i;
		check = true;
		i = xField.indexOf(" ");
		if ( i != -1 )
		{
		check = false;
		}
	return check;	
	}