if (mtDropDown.isSupported()) {
  var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
  
    var menu1 = ms.addMenu(document.getElementById("menu1"));
  menu1.addItem("&nbsp;&nbsp;&nbsp;&nbsp;电力电厂行业方案&nbsp;&nbsp;&nbsp;&nbsp;", "service.asp?id=1");
  menu1.addItem("&nbsp;&nbsp;&nbsp;&nbsp;通信机房标签方案&nbsp;&nbsp;&nbsp;&nbsp;", "service.asp?id=2");
  menu1.addItem("&nbsp;&nbsp;&nbsp;&nbsp;工厂标识方案&nbsp;&nbsp;&nbsp;&nbsp;", "service.asp?id=3");
   menu1.addItem("&nbsp;&nbsp;&nbsp;&nbsp;其他行业应用&nbsp;&nbsp;&nbsp;&nbsp;", "service.asp?id=4");
  
    var menu2 = ms.addMenu(document.getElementById("menu2"));
  menu2.addItem("&nbsp;&nbsp;&nbsp;&nbsp;驱动及软件下载&nbsp;&nbsp;&nbsp;&nbsp;", "download.asp?pId=1");
  menu2.addItem("&nbsp;&nbsp;&nbsp;&nbsp;试用及演示&nbsp;&nbsp;&nbsp;&nbsp;", "download.asp?pId=2");
  menu2.addItem("&nbsp;&nbsp;&nbsp;&nbsp;故障诊断与排除&nbsp;&nbsp;&nbsp;&nbsp;", "download.asp?pId=3");
  
  var menu3 = ms.addMenu(document.getElementById("menu3"));
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;线号机&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=1");
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;标牌铭牌机&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=2");
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;标签机&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=3");
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;雕刻机&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=4");
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;宽幅标签机&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=5");
  menu3.addItem("&nbsp;&nbsp;&nbsp;&nbsp;仪表工具&nbsp;&nbsp;&nbsp;&nbsp;", "products.asp?pId=6");


  mtDropDown.renderAll();
 }