如何在dwr的回调函数中传递多个参数

<script src='/wh/dwr/interface/RjlbHelper.js'></script>

<script>
 function show(v_lbid,v_obj){
  RjlbHelper.getSubRjlbsByFlb(v_lbid,{          //java方法
      callback:function(dataFromServer) {
        update(dataFromServer, v_obj);
      }
   }
  );
  
 }
 function update(v_rjlbs,v_obj){                     //回调函数

  alert（v_rjlbs);

  alert(v_obj);
}
</script>