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

var	menu4	=	ms.addMenu(document.getElementById("mainmenu4"));
menu4.addItem("　招标公告　",	"/index.php/news/ycweiye/1/cn/970/950.html","");
menu4.addItem("　资格预审文件　",	"/index.php/news/ycweiye/1/cn/971/950.html","");
menu4.addItem("　最高限价　",	"/index.php/news/ycweiye/1/cn/972/950.html","");
menu4.addItem("　答疑文件（招标补充通知）　",	"/index.php/news/ycweiye/1/cn/973/950.html","");
menu4.addItem("　开标记录",	"/index.php/news/ycweiye/1/cn/6166/950.html","");
menu4.addItem("　中标结果公示　",	"/index.php/news/ycweiye/1/cn/974/950.html","");

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