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

var	menu1	=	ms.addMenu(document.getElementById("mainmenu1"));
menu1.addItem("行业新闻(一)",	"/index.php/news/jx/1/cn/2660/2659.html","");
menu1.addItem("中标公告",	"/index.php/news/jx/1/cn/4699/2659.html","");
var	menu2	=	ms.addMenu(document.getElementById("mainmenu2"));
menu2.addItem("领导致辞",	"/userlist/jx/text-2723.html","");
var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("国内新闻",	"/index.php/news/jx/1/cn/4866/2668.html","");

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