/**
  * Returns additional URL parameters which must be added to list products seo urls
  *
  * @return string
  */
 public function getAddSeoUrlParams()
 {
     $sAddParams = parent::getAddSeoUrlParams();
     if ($sParam = oxConfig::getParameter("searchrecomm", true)) {
         $sAddParams .= "&searchrecomm=" . rawurlencode($sParam);
     }
     return $sAddParams;
 }