function validate_form(form)
{
  with (form) {
    if (realname.value == null || realname.value == '') {
      alert("Name is a required field.");
      realname.focus();
      return false;
    }

    email_domain = email.value.match( /(^\w+([\.\-]\w+)*)\@(\w+([\.\-]\w+)*\.[a-zA-Z]{2,3})$/ );
    email_domain = (email_domain && email_domain[3])? email_domain[3] : '';
    
    if (email_domain == '') {
      alert("Please enter a valid email address.  We need it to send you the login information.");
      email.focus();
      return false;
    }
    
    return true;
  }
}