if (mtDropDown.isSupported()) {

		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
		
		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("  公司简介", "intro.jsp");
		menu1.addItem("  企业文化", "intro2.jsp?classid=5&typeid=2");
		
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("  产品中心", "productdetail.jsp");
		menu2.addItem("  新品推介", "product2.jsp?classid=3&typeid=1");
                
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("  行业新闻", "news.jsp");
		menu3.addItem("  资料中心", "news.jsp?classid=9&typeid=7");
				
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("  联系我们", "contact.jsp");
		menu4.addItem("  留言板", "ly.jsp?classid=13&typeid=11");

	
		mtDropDown.renderAll();
	}