function validEmail(form) {

if (form.Email.value == '') 
	{
		alert("Please enter an Email address.");
		form.Email.focus();
		return false;
	} else {
	
	if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(form.Email.value))){
			alert("Invalid email address format. Please revise your entry.");
			form.Email.focus();
			return false;
			} else { return true; }
	 }

}