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;公司简介&nbsp;&nbsp;", "zhtml_1.htm");
       menu1.addItem("&nbsp;&nbsp;企业文化&nbsp;&nbsp;", "zhtml_12.htm");
	   menu1.addItem("&nbsp;&nbsp;公司荣誉&nbsp;&nbsp;", "zhtml_19.htm");
  
       var menu2 = ms.addMenu(document.getElementById("menu2"));
       menu2.addItem("&nbsp;&nbsp;最新产品&nbsp;&nbsp;", "zpro_list_4_1.htm");
       menu2.addItem("&nbsp;&nbsp;产品分类&nbsp;&nbsp;", "zpro_list_1_1.htm");
       menu2.addItem("&nbsp;&nbsp;标准色卡&nbsp;&nbsp;", "zpro_list_14_1.htm");
  
       mtDropDown.renderAll();
}