function validateForm(form) {
var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var address = document.forms.myForm.tfa_Email.value;

	if (reg.test(address) === false) {
	document.myForm.tfa_Email.focus();
  alert( 'Please enter a valid email address');
	return false;
	}
}