if (mtDropDown.isSupported()) {

		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
//第二菜单
var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("- 公司简介", "company.asp"); 
		menu1.addItem("- 资质证书", "certificate.asp"); // send no URL if nothing should happen onclick
		menu1.addItem("- 经营业绩", "performance.asp"); 
		
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("- 散堆填料", "products.asp?nclassid=572"); 
		menu3.addItem("- 规整填料", "products.asp?nclassid=573"); 
		menu3.addItem("- 塔内件", "products.asp?nclassid=574"); 
		menu3.addItem("- 塔盘", "products.asp?nclassid=601"); 
		
		var menu5 = ms.addMenu(document.getElementById("menu5"));
		menu5.addItem("- 公司新闻", "newsmore.asp?sort=1"); 
		menu5.addItem("- 行业快讯", "newsmore.asp?sort=2"); 
		menu5.addItem("- 招贤纳士", "newsmore.asp?sort=3"); 
		
		
		
		
	mtDropDown.renderAll();
	}