window.updateLightboxCount = function()
    {
        if (
             window.id_registrant != ""
          && $( "lightboxImageCount" )
           )
        {
            new Ajax.Updater(
                                $( "lightboxImageCount" ),
                                "./php/ajax/getPortfolioInLightboxCount.php",
                                {
                                    "parameters": {
                                         "id_registrants": window.id_registrant
                                                  }

                                }
                            );
        }
    }