function ProcessMenuItemClick(obj) {
    if (!obj.nextSibling) {
        return true;
    }
    if (obj.nextSibling.style.display == "none") {
        obj.nextSibling.style.display = "block";
        var menulist = obj.parentNode.parentNode;
        var listObj = menulist.firstChild;
        while (listObj) {
            var linkObj = listObj.firstChild;
            if (linkObj && linkObj != obj && linkObj.nextSibling) {
                linkObj.nextSibling.style.display = "none";
            }
            listObj = listObj.nextSibling;
        }
        return false;
    }
    return true;
}