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;关于住博会&nbsp;&nbsp;&nbsp;&nbsp;", "zhgk.asp");
  menu1.addItem("  ||&nbsp;往届回顾&nbsp;&nbsp;&nbsp;&nbsp;", "zhgk_2.asp");
  
 var menu2 = ms.addMenu(document.getElementById("menu2"));
  menu2.addItem("  ||&nbsp;展示范围&nbsp;&nbsp;&nbsp;&nbsp;", "czzn.asp");
  menu2.addItem("  ||&nbsp;邀请函&nbsp;&nbsp;&nbsp;&nbsp;", "czzn_1.asp");
  menu2.addItem("  ||&nbsp;展位图&nbsp;&nbsp;&nbsp;&nbsp;", "czzn_2.asp");
  menu2.addItem("  ||&nbsp;媒体推广&nbsp;&nbsp;&nbsp;&nbsp;", "czzn_3.asp");
  menu2.addItem("  ||&nbsp;参展须知&nbsp;&nbsp;&nbsp;&nbsp;", "czzn_4.asp");


  var menu3 = ms.addMenu(document.getElementById("menu3"));
  menu3.addItem("  ||&nbsp;参观信息&nbsp;&nbsp;&nbsp;&nbsp;", "cgzn.asp");
  menu3.addItem("  ||&nbsp;展位图&nbsp;&nbsp;&nbsp;&nbsp;", "czzn_2.asp");
  menu3.addItem("  ||&nbsp;展商名录&nbsp;&nbsp;&nbsp;&nbsp;", "cgzn_2.asp");


  var menu4 = ms.addMenu(document.getElementById("menu4"));
  menu4.addItem("  ||&nbsp;主题论坛&nbsp;&nbsp;&nbsp;&nbsp;", "lthd.asp");
  menu4.addItem("  ||&nbsp;精彩活动&nbsp;&nbsp;&nbsp;&nbsp;", "lthd_1.asp");

  var menu5 = ms.addMenu(document.getElementById("menu5"));
  menu5.addItem("  ||&nbsp;房讯快报&nbsp;&nbsp;&nbsp;&nbsp;", "news.asp?lanmu=房讯快报");
  menu5.addItem("  ||&nbsp;展会新闻&nbsp;&nbsp;&nbsp;&nbsp;", "news.asp?lanmu=展会新闻");
  menu5.addItem("  ||&nbsp;行业新闻&nbsp;&nbsp;&nbsp;&nbsp;", "news.asp?lanmu=行业新闻");
  menu5.addItem("  ||&nbsp;焦点楼盘&nbsp;&nbsp;&nbsp;&nbsp;", "news.asp?lanmu=焦点楼盘");

  
  mtDropDown.renderAll();
 }