var id;
   function ajaxLoad(sURL, sID, sPARS ) {       
       var url = sURL;
       id  = sID;
       var pars = sPARS;
       //$(id).innerHMTL = "Đang nạp "+ "<IMG SRC='Images/Sys/waiting.gif' />";
       var myAjax = new Ajax.Request(
               url,
               {
                   method: 'get',
                   parameters: pars,
                   onComplete: showResponse
               });
   }
   function showResponse(transport) {
       $(id).innerHTML =  transport.responseText;       
   }