//Javascript

function validate_email(form)
{	
	var emailval = form.email.value;
	
	if(emailval == ""){
		return false;
		alert("Invalid Email");
	}else{
		apos = emailval.indexOf("@");
		dotpos = emailval.lastIndexOf(".");
		
		if (apos<1||dotpos-apos<2)
		{
			return false;
			alert("Invalid Email");
		}else{
			return true;
		}
	}
}