function popup_trailer(url)
    {
    if (!window.focus)
        return true;
    if (typeof(url) != 'string')
       url = url.href;
    w = window.open(url, 'trailer', 'width=650,height=550,dependent=yes,status=no,location=no,scrollbars=no');
    w.focus();
    return false;
    }