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

var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("关于我们",	"/userlist/admin/text-87.html","");
menu3.addItem("域名知识",	"/userlist/admin/text-518.html","");
menu3.addItem("知识培训",	"/userlist/admin/text-519.html","");
menu3.addItem("网络推广",	"/userlist/admin/text-521.html","");
menu3.addItem("网络维护",	"/userlist/admin/text-523.html","");
menu3.addItem("你问我答",	"/userlist/admin/text-522.html","");
menu3.addItem("为您服务",	"/userlist/admin/text-520.html","");

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