if (mtDropDown.isSupported()) {

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

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("- 作业内容","product_1.asp?pid=11"); 
		menu1.addItem("- 产品系列","product.asp?pid=1");

		var subMenu0 = menu1.addMenu(menu1.items[0]);
		subMenu0.addItem("- 船舶工业", "list_view.asp?sid=12");
		subMenu0.addItem("- 建筑工程", "list_view.asp?sid=13");
		subMenu0.addItem("- 设备维护", "list_view.asp?sid=14");
		subMenu0.addItem("- 现场案例", "list_view.asp?sid=16");
				
		var subMenu1 = menu1.addMenu(menu1.items[1]);
		subMenu1.addItem("- 剪叉式系列", "list_view.asp?sid=8");
		subMenu1.addItem("- 直臂式系列", "list_view.asp?sid=9");
		subMenu1.addItem("- 履带式系列", "list_view.asp?sid=10");
		subMenu1.addItem("- 手推式系列", "list_view.asp?sid=17");
	
//第二菜单
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("- 客户服务", "guestbook.asp"); 
		menu2.addItem("- 资料下载", "down.asp?id=1");

//二级－一
		var subMenu0 = menu2.addMenu(menu2.items[0]);
		subMenu0.addItem("- 产品在线咨询", "guestbook.asp");
		subMenu0.addItem("- 客户意见反馈", "client.asp");		
		
		var subMenu1 = menu2.addMenu(menu2.items[1]);
		subMenu1.addItem("- 产品资料下载", "down.asp?id=1");
		
	
		// menu : 3
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("- 经销商查询", "dealers_select.asp?info=1");
		menu3.addItem("- 服务中心查询", "dealers_select.asp?info=2");
	
		
		mtDropDown.renderAll();
	}