setMenuActive = function(node) {
    node.oldClassName = node.className;
    node.className = 'active';
}

setMenuPassive = function(node) {
    node.oldClassName = node.className;
    node.className = 'passive';
}

setMenuOldState = function(node) {
    if (node.oldClassName);
        node.className = node.oldClassName;
}