if (GDNetMenuDown.isSupported()) {

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

        var menu1 = ms.addMenu(document.getElementById("menu1"));
menu1.addItem("专业，源于热爱", "text.asp?id=251");
menu1.addItem("企业文化", "text.asp?id=559");
menu1.addItem("人才招聘", "text.asp?id=611");

    	var menu2 = ms.addMenu(document.getElementById("menu2"));
menu2.addItem("服务体系", "text.asp?id=438");
menu2.addItem("加入我们", "text.asp?id=550");
menu2.addItem("服务承诺", "text.asp?id=551");
menu2.addItem("售后须知", "text.asp?id=552");

    	var menu3 = ms.addMenu(document.getElementById("menu3"));
menu3.addItem("技术培训", "text.asp?id=275");

    	var menu4 = ms.addMenu(document.getElementById("menu4"));
menu4.addItem("“一号通”智能号", "text.asp?id=549");
menu4.addItem("长途IP业务", "text.asp?id=553");
menu4.addItem("中继线业务", "text.asp?id=560");
menu4.addItem("宽带业务", "text.asp?id=561");


        GDNetMenuDown.renderAll();
    }