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", "gywm.jsp");
		menu1.addItem("	企业文化", "gywm.jsp?typeid=2&classid=7");
		menu1.addItem("	荣誉资质", "zizhi.jsp?typeid=2&classid=8");
		menu1.addItem("	大事记", "gywm.jsp?typeid=2&classid=9");
		menu1.addItem("	生产设备", "gywm.jsp?typeid=2&classid=10");
		menu1.addItem("	跋涉者心语", "gywm.jsp?typeid=2&classid=11");
		menu1.addItem("	ROHS报告", "gywm.jsp?typeid=2&classid=12");
		
 
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("	公司新闻", "xwzx.jsp");
		menu2.addItem("	行业新闻", "xwzx.jsp?typeid=3&classid=14");
		menu2.addItem("	政策法规", "xwzx.jsp?typeid=3&classid=15");
		
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("	石英晶体谐振器", "cpzx.jsp");
		menu3.addItem("	石英晶体振荡器", "cpzx.jsp?classid=3&typeid=1");
		menu3.addItem("	时钟晶体振荡器", "cpzx.jsp?classid=4&typeid=1");
		menu3.addItem("	温补晶体振荡器", "cpzx.jsp?classid=5&typeid=1");
		menu3.addItem("	恒温晶体振荡器", "cpzx.jsp?classid=6&typeid=1");
		menu3.addItem("	石英晶体滤波器", "cpzx.jsp?classid=7&typeid=1");
		menu3.addItem("	负温度系数热敏电阻器", "cpzx.jsp?classid=8&typeid=1");
		menu3.addItem("	正温度系数热敏电阻器", "cpzx.jsp?classid=9&typeid=1");
		menu3.addItem("	压电陶瓷", "cpzx.jsp?classid=10&typeid=1");
		
		mtDropDown.renderAll();
	}