function toggleMenuItem(id) {
    var titleTr = document.getElementById(id + '_title');
    var subTr = document.getElementById(id + '_sub');
    var tdMenu = document.getElementById("menuBul_"+id);

    if (titleTr.className == 'menuItemPassive') {
        titleTr.className = 'menuItemActive';
        subTr.style.display = '';
        tdMenu.className = "menuBulSub";
    } else if (titleTr.className == 'menuItemActive') {
        titleTr.className = 'menuItemPassive';
        subTr.style.display = 'none';
        tdMenu.className = "menuBul";
    }
}