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

var	menu4	=	ms.addMenu(document.getElementById("mainmenu4"));
menu4.addItem("行业新闻",	"/index.php/news/shuilingyacom/1/cn/3876/1008.html","");

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