if (document.getElementById) {
    document.write('<style type="text/css">\n')
    document.write('.submenu{display: none;}\n')
    document.write('</style>\n')
}

function SwitchMenu(obj) {
    if (document.getElementById) {
        var el = document.getElementById(obj);
        if (document.getElementById("masterdiv") != null && document.getElementById("masterdiv").getElementsByTagName("div") != null && el != null) {
            var ar = document.getElementById("masterdiv").getElementsByTagName("div");
            if (el.style.display != "block") {
                for (var i = 0; i < ar.length; i++) {
                    if (ar[i].className == "submenu")
                        ar[i].style.display = "none";
                }
                el.style.display = "block";
            } else {
                el.style.display = "none";
            }
        }
    }
}