function CheckEmail(elemt, Label, bMandatory)
{

	//------------------------------------------------------------------------------
	// elemt				: The control passed for validation
	// Label				: The Label to be displaye in the message box
	// bMandatory		: Whether this is mandatory / not
	//              : True   : this field cannot be left blank
	//              : Falase : This field can be left blank.  But, if is non empty then considered for validation.
	//------------------------------------------------------------------------------
	
	var str
	str = elemt.value.split(" ").join("")
	
	if (!ValidateEmail(str,Label, bMandatory))
	{
		elemt.focus();
		return (false);
	}
	else
	{	
		return (true);
	}
}

function ValidateEmail(str,Label,bMandatory) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		
		if (!bMandatory && str=="")
		{
			return (true);
		}
	
		if (bMandatory && str=="")
		{
			alert(Label)
			return (false);
		}
		
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID!")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID!")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID!")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID!")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID!")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID!")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID!")
		    return false
		 }
		 if (str.indexOf("'")!=-1){
		    alert("Replace ' with Alphabet,Numeric")
		    return false
		 }
 		 return true					
	}