function validate(){
	var doc = document._Newsletter;
	
	var validemail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	if (!validemail.test(doc.Email.value))
	{
		alert("A valid email is required");
		doc.Email.focus();
		return false;
	}
	
	return true;
}