//taken from http://www.quirksmode.org/js/mailcheck.html. Not perfect. But should work for most people.
//
function checkMail()
{
	var x = document.forms[1].email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x)) alert('Please Check the email address you entered. It was not validated. Thankyou.');
}