if (mtDropDown.isSupported()) {

    var ms = new mtDropDownSet(mtDropDown.direction.down, -3, -1, mtDropDown.reference.bottomLeft);
    
    //top
    var menu1 = ms.addMenu(document.getElementById("menu1"));
    menu1.addItem("   微软认证   ", "./MicrosoftCertified.aspx");
    menu1.addItem("   紧缺人才培养   ", "./CultivateTalents.aspx");
    menu1.addItem("   微软动手实验营   ", "./HandsOnLab.aspx");

    var menu2 = ms.addMenu(document.getElementById("menu2"));
    menu2.addItem("   微软大学生实训营   ", "./TrainingRoom.aspx");
    menu2.addItem("   国际名企定向班   ", "#");
    menu2.addItem("   微软项目实习   ", "./ServiceItemDetail.aspx");
    menu2.addItem("   紧缺人才培养   ", "./CultivateTalents.aspx");
    menu2.addItem("   微软认证   ", "./MicrosoftCertified.aspx");


    ///bottom
    var menu3 = ms.addMenu(document.getElementById("menu3"));
    menu3.addItem("   微软认证   ", "./MicrosoftCertified.aspx");
    menu3.addItem("   紧缺人才培养   ", "./CultivateTalents.aspx");
    menu3.addItem("   微软动手实验营   ", "./HandsOnLab.aspx");

    var menu4 = ms.addMenu(document.getElementById("menu4"));
    menu4.addItem("   微软大学生实训营   ", "./TrainingRoom.aspx");
    menu4.addItem("   国际名企定向班   ", "#");
    menu4.addItem("   微软项目实习   ", "./ServiceItemDetail.aspx");
    menu4.addItem("   紧缺人才培养   ", "./CultivateTalents.aspx");
    menu4.addItem("   微软认证   ", "./MicrosoftCertified.aspx");

    mtDropDown.renderAll();
}