function showItem(iid) {

    var counter = 0;
    while ($('i' + counter) != null) {
        $('i' + counter).removeClassName('on');
        if ($('f' + counter).visible())
            $('f' + counter).toggle();
        counter++;
    }

    $('f' + iid).toggle();
    $('i' + iid).addClassName('on');

}