function _displayForm($tpl, $airport)
 {
     $document =& JFactory::getDocument();
     /* @var $document JDocument */
     $error = JRequest::getInt('error');
     $data = JRequest::get('post');
     JFilterOutput::objectHTMLSafe($airport);
     $document->setTitle(BookProHelper::formatName($airport));
     /* @var $params JParameter */
     $countrybox = BookProHelper::getCountrySelect($airport->country_id);
     $this->countries = $countrybox;
     //$this->assignRef("parents",$this->getParentBox($airport->parent_id));
     //$this->assignRef('obj', $airport);
     parent::display($tpl);
 }