public function displayHeader()
 {
     if (Tools::getValue('ajax') != 'true') {
         parent::displayHeader();
     }
 }
 public function displayHeader()
 {
     self::$smarty->assign('nobots', 1);
     if (!Tools::getValue('ajax')) {
         parent::displayHeader();
     }
 }
 public function displayHeader()
 {
     if (!Tools::getValue('ajax')) {
         parent::displayHeader();
     }
 }