var d = new Date();
              var strURL='xxxx'          

              jQuery.ajax({
                        type: "Get",
                        url: strURL

                        data: strURL,
                        success: function (data) {
                               var chartObj = getChartFromId("myid");
                               chartObj.setDataXML(data);              //這里直接用data 來設置myid的內容就可以了.
                        }
                    });
     }