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

var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("宠物销售",	"/userlist/caijia/text-13460.html","");

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