if (mtDropDown.isSupported()) {

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

	
//第二菜单
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("== 概念与原理", "news.asp"); 
		menu2.addItem("== 科研机构", "yenews.asp");
		menu2.addItem("== 研究中心", "keyan.asp");
		menu2.addItem("== 科研项目", "kxnews.asp");// send no URL if nothing should happen onclick
		menu2.addItem("== 科研成果", "kcnews.asp"); 
		menu2.addItem("== 学术交流", "xsjlnews.asp");
		menu2.addItem("== 专家学者", "zjxznews.asp");// send no URL if nothing should happen onclick

	
		// menu : 3
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("== 详细概况", "tggk.asp");
		menu3.addItem("== 机具推介", "tgjiju.asp");
	    menu3.addItem("== 技术模式", "tgmoshi.asp");
		menu3.addItem("== 示范工程", "tggc.asp");
		menu3.addItem("== 技术培训", "tgjishu.asp");
	    menu3.addItem("== 典型经验", "tgjingyan.asp");

       // menu : 4
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("== 免耕播种机", "miangeng.asp");
		menu4.addItem("== 少耕机具", "shaogeng.asp");
		menu4.addItem("== 秸秆粉碎机", "jiegan.asp");
		menu4.addItem("== 喷药机", "penyao.asp");
		menu4.addItem("== 其他机具", "qita.asp");
		
	       // menu : 5
		var menu5 = ms.addMenu(document.getElementById("menu5"));
		menu5.addItem("== 科学研究", "download.asp?BigClassName=科学研究");
		menu5.addItem("== 应用推广", "download.asp?BigClassName=应用推广");
		menu5.addItem("== 相关企业", "download.asp?BigClassName=相关企业");
		menu5.addItem("== 机具推介", "download.asp?BigClassName=机具推介");
		menu5.addItem("== 其他信息", "download.asp?BigClassName=其他信息");

	
	
		mtDropDown.renderAll();
	}