function verifyRequired2() {
  if (!valid_email(document.form_signup["fields_email"].value)) {
    document.form_signup["fields_email"].focus();
    alert("Sorry, that email addres is not vaild.\nPlease enter a valid email address.");
    return false;
  }
  return true;
}
function valid_email(email) {
  var reg = /^([A-Za-z0-9_\/\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
  if(reg.test(email) == false) return false;
  return true;  
}