function IsValidEmail(pEmail)
{
	//alert("In email validation" + pEmail);
	
	if (pEmail.length < 1)
	{
		return(false)
	}
	var FirstIndexPos = 0
	var LastIndexPos = 0
	var AtIndexPos = 0
	var LastDotIndexPos = 0
	var cDigit = ''
	var i = 0
	var FirstdDigit = '', LastDigit = ''

	FirstDigit = pEmail.substring(0,1)
	LastDigit  = pEmail.substring(pEmail.length-1,pEmail.length)
	for (i=0;i<pEmail.length;i++)
	{
		cDigit = pEmail.substring(i,i+1)
		if (IsValidEmailCharacter(cDigit)==false)
		{
			return(false)
		}
	}
	FirstIndexPos = pEmail.indexOf("@")
	LastIndexPos  = pEmail.lastIndexOf("@")
	if (FirstIndexPos < 0 || LastIndexPos != FirstIndexPos)
		{
			return(false)
		}
	AtIndexPos = FirstIndexPos
	FirstIndexPos = pEmail.indexOf(".")
	if (FirstIndexPos < 0 )
		{
			return(false)
		}
	LastDotIndexPos = pEmail.lastIndexOf(".")
	if(pEmail.length > (LastDotIndexPos +4) )
	{
			return(false)		
	}
//	one digit compulsory between @ and last dot.
	if (LastDotIndexPos-AtIndexPos < 2 )
		{
			return(false)
		}
//	one digit compulsory after the last dot.
	if (pEmail.length-LastDotIndexPos < 2 )
		{
			return(false)
		}
//	2 consecutive dots should not occur.
	if (pEmail.indexOf("..") > -1 )
		{
			return(false)
		}

	//@ and dot should'nt be alowed toghether
if (pEmail.indexOf("@.") > -1 )
		{
			return(false)
		}
if (pEmail.indexOf(".@") > -1 )
		{
			return(false)
		}

if (pEmail.indexOf("-@") > -1 )
		{
			return(false)
		}
if (pEmail.indexOf("@-") > -1 )
		{
			return(false)
		}

if (pEmail.indexOf("_@") > -1 )
		{
			return(false)
		}
if (pEmail.indexOf("@_") > -1 )
		{
			return(false)
		}
if (pEmail.indexOf("._") > -1 )
		{
			return(false)
		}

if (pEmail.indexOf("_.") > -1 )
		{
			return(false)
		}

if (pEmail.indexOf(".-") > -1 )
		{
			return(false)
		}
if (pEmail.indexOf("-.") > -1 )
		{
			return(false)
		}


return(true)
}
function IsValidEmailCharacter(pLetter)
{
	if (pLetter == "@" || pLetter == "_" || pLetter == "." || pLetter == "-")
		{
			return(true)
		}
	if (IsDigit(pLetter) || IsAlpha(pLetter))
		{
			return(true)
		}
	return(false)
}
function IsAlpha(pLetter)
{
	vLetter = pLetter.toUpperCase()
	if (vLetter >= "A" && vLetter <= "Z")
	{
		return(true)
	}
	return(false)
}

//Returns false if the parameter pLetter is not numeric figure.
function IsDigit(pLetter)
{
	if (pLetter >= "0" && pLetter <= "9")
	{
		return(true)
	}
	return(false)
}

//Date Validation 

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 getMonth(month){
	//alert (month);
	var returnMonth;
	switch(month) {
		case "Jan":
			returnMonth = "01";
			break;
		case "Feb":
			returnMonth ="02";
			break;
		case "Mar":
			returnMonth ="03";
			break;
		case "Apr":
			returnMonth ="04";
			break;
		case "May":
			returnMonth ="05";
			break;
		case "Jun":
			returnMonth ="06";
			break;
		case "Jul":
			returnMonth ="07";
			break;
		case "Aug":
			returnMonth ="08";
			break;
		case "Sep":
			returnMonth ="09";
			break;
		case "Oct":
			returnMonth ="10";
			break;
		case "Nov":
			returnMonth ="11";
			break;
		case "Dec":
			returnMonth ="12";
		}
	return returnMonth;
}

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){
	//alert(dtStr);
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=getMonth(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
}