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

var	menu2	=	ms.addMenu(document.getElementById("mainmenu2"));
menu2.addItem("ABOUT US",	"/index.php/text/qinhangwl/1/cn/4450/4283.html","");

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