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

var	menu2	=	ms.addMenu(document.getElementById("mainmenu2"));
menu2.addItem("企业概况",	"http://www.rong1.net/userlist/mb0072/text-36652.html","");
menu2.addItem("企业文化",	"/userlist/mb0072/text-36654.html","");
var	menu4	=	ms.addMenu(document.getElementById("mainmenu4"));
menu4.addItem("印刷服务",	"http://www.rong1.net/userlist/mb0072/text-36656.html","");
menu4.addItem("画图开模",	"/userlist/mb0072/text-36658.html","");
var	menu6	=	ms.addMenu(document.getElementById("mainmenu6"));
menu6.addItem("公司新闻",	"http://www.rong1.net/index.php/news/mb0072/1/cn/36660/36660.html","");
menu6.addItem("行业新闻",	"/index.php/news/mb0072/1/cn/36662/36660.html","");

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