function updateChart1(DOMId){
         var chartObj = getChartFromId("chart1Id");
         chartObj.setDataURL("/Charts/HSBCsysdata.xml");
      }
      
      function updateChart2(DOMId){
         var chartObj = getChartFromId("chart1Id");
         chartObj.setDataURL("/Charts/IRPdata.xml");
      }
      
      function updateChart3(DOMId){
         var chartObj = getChartFromId("chart1Id");
         chartObj.setDataURL("/Charts/TWSEsysdata.xml");
      }