if (mtDropDown.isSupported()) {
  var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
  var menu1 = ms.addMenu(document.getElementById("menu1"));
  menu1.addItem("  小说推荐", "html/wenxuechuangzuo/xiaoshuotuijian");
  menu1.addItem("  新作推荐", "html/wenxuechuangzuo/xinzuotuijian");
  menu1.addItem("  理论探索", "html/wenxuechuangzuo/liluntansuo");
  menu1.addItem("  青春校园", "html/wenxuechuangzuo/qingchunxiaoyuan");
  menu1.addItem("  文坛快讯", "html/wenxuechuangzuo/wentankuaixun");
  
  var menu2 = ms.addMenu(document.getElementById("menu2"));
  menu2.addItem("  名段欣赏", "html/xijuxiehui/mingduanxinshang");
  menu2.addItem("  理论研究", "html/xijuxiehui/lilunyanjiu");
  menu2.addItem("  剧本赏析", "html/xijuxiehui/jubenshangxi");
  menu2.addItem("  名段曲谱", "html/xijuxiehui/mingduanqupu");
  menu2.addItem("  梨园咨询", "html/xijuxiehui/liyuanzixun");
  
  var menu3 = ms.addMenu(document.getElementById("menu3"));
  menu3.addItem("  美术动态", "html/meishuxiehui/meishudongtai");
  menu3.addItem("  名家名作", "html/meishuxiehui/mingjiamingzuo");
  menu3.addItem("  三晋名家", "html/meishuxiehui/sanjinmingjia");
  menu3.addItem("  定襄绘画", "html/meishuxiehui/dingxianghuihua");
  menu3.addItem("  民间美术", "html/meishuxiehui/minjianmeishu");
  menu3.addItem("  画苑新人", "html/meishuxiehui/huayuanxinren");
  menu3.addItem("  创作体会", "html/meishuxiehui/chuangzuotihui");
  
  var menu4 = ms.addMenu(document.getElementById("menu4"));
  menu4.addItem("  沱河新浪", "html/shigexiehui/tuohexinlang");
  menu4.addItem("  蒙山古韵", "html/shigexiehui/mengshanguyun");
  menu4.addItem("  校园绿柳", "html/shigexiehui/xiaoyuanlvliu");
  menu4.addItem("  诗人印象", "html/shigexiehui/shirenyinxiang");
  mtDropDown.renderAll();
 }