if (mtDropDown.isSupported()) {

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

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("  圣美简介", "about.asp");
		menu1.addItem("  圣美理念", "about2.asp");
		menu1.addItem("  圣美架构", "about3.asp");
		

		
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("  公司新闻", "NewsClass.asp?owen1=企业新闻");
		menu3.addItem("  行业动态", "NewsClass.asp?owen1=行业动态");
		menu3.addItem("  技术园地", "NewsClass.asp?owen1=技术园地");
		
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("  联系我们", "contact.asp");
		menu4.addItem("  留言板", "Feedback.asp");



		mtDropDown.renderAll();
	}