/**
  * @return bool
  * @param bool $b_enabled
  * @desc Sets whether the XhtmlSelect is enabled
  */
 function SetEnabled($b_enabled)
 {
     if ($b_enabled) {
         $this->o_select->RemoveAttribute('disabled');
     } else {
         $this->o_select->AddAttribute('disabled', 'disabled');
     }
 }