function checkEmail(myForm) {

	var x = myForm.email.value;
	
	if ( x.length == 0 ) {
		alert("Please enter your email address.");
		return (false);
	}
	
	var regex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	
	if ( x.match ( regex ) ) {
		return (true);
	} else {
		alert("Invalid email address! Please re-enter.");
	}

	return (false);
}