function emptyField(textobj)
{
	if(textobj.value.length==0)
	{
		 textobj.focus();
		 return true;
	}
	for(var i=0;i < textobj.value.length;++i)
	{
		var ch =textobj.value.charAt(i);
	if(ch!=' '&&ch!= '\t') 
		return false;
	}
	textobj.focus();
	return true;
}
function contactvalidate()
{
	if(emptyField(document.getElementById("na")))	
	{
		alert("Please Enter Name.");
		document.getElementById("na").focus();
		return(false);
	}
	if(emptyField(document.getElementById("email")))	
	{
		alert("Please Enter Email.");
		document.getElementById("email").focus();
		return(false);
	}
	var inem1,inem2,lenem1,l,l1,lenem2,lensp,lechar;
	inem1 = document.getElementById("email").value.length;
	l = document.getElementById("email").value;
	l1 = l.lastIndexOf('.');
	lenem1 = l.lastIndexOf('@');
	lenem2 = l.indexOf('@');
	lensp = l.indexOf(' ');
	lechar = l.charAt(lenem1 + 1);
	if(lechar == '.')
	{
		alert("Please Enter Valid Email");
		document.getElementById("email").focus();
		return (false);
	}
	if((lenem1 + 1) == l1 || (l1 + 1) == inem1 || lenem1 > l1 || lenem2 != lenem1 || lensp != -1 || lenem1 == 0)
	{
		alert("Please Enter Valid Email");
		document.getElementById("email").focus();
		return (false);
	}
	
	if(document.getElementById("email").value.indexOf('@') == -1 || document.getElementById("email").value.indexOf('.')== -1)
	{
	alert("Please Enter Valid Email");
	document.getElementById("email").focus();
	return (false);
	}
	popUpWin = open('joinmaillist.asp?email='+ document.getElementById("na").value +'&na='+ document.getElementById("email").value +'', 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width=300,height=100,left=0, top=0');
	return true;
}