if (mtDropDown.isSupported()) 
		{
			var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);

var	menu1	=	ms.addMenu(document.getElementById("mainmenu1"));
menu1.addItem("互联网与企业",	"/userlist/admin/text-23.html","");
menu1.addItem("企业为什么要建网站？",	"/userlist/admin/text-28.html","");
menu1.addItem("电子商务ABC",	"/userlist/admin/text-25.html","");
menu1.addItem("网站维护",	"/userlist/admin/text-26.html","");
menu1.addItem("你问我答",	"/userlist/admin/text-27.html","");

			mtDropDown.renderAll();
		}
		//初始菜单
		window.onload = init;