if (GDNetMenuDown.isSupported()) {


        var ms = new GDNetMenuDownSet(GDNetMenuDown.direction.down, 0, 0, GDNetMenuDown.reference.bottomLeft);


        var menu1 = ms.addMenu(document.getElementById("menu1"));
        menu1.addItem("公司介绍", "about.asp?id=1");
        menu1.addItem("部门简介", "about.asp?id=2");
        menu1.addItem("代理产品", "about.asp?id=3");
   

        var menu2 = ms.addMenu(document.getElementById("menu2"));
        menu2.addItem("业界视角", "industry.asp?id=21");
		menu2.addItem("新品发布", "industry.asp?id=22");
		menu2.addItem("专栏评述", "industry.asp?id=23");
		menu2.addItem("公司动态", "industry.asp?id=24");
             

        var menu3 = ms.addMenu(document.getElementById("menu3"));
        menu3.addItem("私宅智能影音系统", "case.asp?id=13");
		menu3.addItem("灯光扩声及智能会议系统", "case.asp?id=14");
		menu3.addItem("数字屏幕拼接及融合系统", "case.asp?id=15");
		menu3.addItem("背景音乐及智能广播系统", "case.asp?id=16");
		menu3.addItem("LED电子屏显示系统", "case.asp?id=17");
		menu3.addItem("远程音视频互动系统", "case.asp?id=18");
		menu3.addItem("网络监控及智能报警系统", "case.asp?id=19");
		menu3.addItem("网络教学及会议录播系统", "case.asp?id=20");


        var menu4 = ms.addMenu(document.getElementById("menu4"));
        menu4.addItem("产品知识", "tech.asp?id=25");
		menu4.addItem("选购常识", "tech.asp?id=26");
		menu4.addItem("保养知识", "tech.asp?id=27");
		menu4.addItem("热点技术", "tech.asp?id=28");
		menu4.addItem("环境装修", "tech.asp?id=29");


		
		var menu5 = ms.addMenu(document.getElementById("menu5"));
        menu5.addItem("私宅智能影音系统", "program.asp?id=30");
		menu5.addItem("灯光扩声及智能会议系统", "program.asp?id=31");
		menu5.addItem("数字屏幕拼接及融合系统", "program.asp?id=32");
		menu5.addItem("背景音乐及智能广播系统", "program.asp?id=33");
		menu5.addItem("LED电子屏显示系统", "program.asp?id=34");
		menu5.addItem("远程音视频互动系统", "program.asp?id=35");
		menu5.addItem("网络监控及智能报警系统", "program.asp?id=36");
		menu5.addItem("网络教学及会议录播系统", "program.asp?id=37");
		
		var menu6 = ms.addMenu(document.getElementById("menu6"));
        menu6.addItem("商务用途", "shopping.asp?id=38");
		menu6.addItem("私宅影音", "shopping.asp?id=39");
		menu6.addItem("音响灯光", "shopping.asp?id=40");
		menu6.addItem("促销公告", "shopping.asp?id=41");
		menu6.addItem("在线交流", "tencent://message/?uin=542359790&Site=北京中广盛源商贸有限公司&Menu=yes>");
		
		var menu7 = ms.addMenu(document.getElementById("menu7"));
        menu7.addItem("售前支持", "service.asp?id=15");
		menu7.addItem("售后承诺", "service.asp?id=16");
		menu7.addItem("客户权益保障", "service.asp?id=17");
		menu7.addItem("安装调试", "service.asp?id=18");
		menu7.addItem("维修网络", "service.asp?id=19");
		
		var menu8 = ms.addMenu(document.getElementById("menu8"));
        menu8.addItem("如何购买", "contact.asp?id=4");
		menu8.addItem("支付信息", "contact.asp?id=5");
		menu8.addItem("联系方式", "contact.asp?id=6");

        GDNetMenuDown.renderAll();
    }