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","about.asp"); // send no URL if nothing should happen onclick
		menu1.addItem("- 联系我们","Contact.asp");	
	
//第二菜单
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("- 产品展示", "Product.asp");
		menu3.addItem("- 产品分类", "Products.asp");
	    menu3.addItem("- 产品搜索", "search.asp");
		var menu5 = ms.addMenu(document.getElementById("menu5"));
		var menu6 = ms.addMenu(document.getElementById("menu6"));
		var menu7 = ms.addMenu(document.getElementById("menu7"));
		menu7.addItem("- 信息反馈", "Feedback.asp");
		menu7.addItem("- 留言中心", "NetBook.asp");
	
		mtDropDown.renderAll();
	}