// JavaScript Document
function validate_email(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(email.value) == false) {
      alert('Invalid Email Address');
	  email.focus();
      return false;
   }
}