function tick(){
    var var_upload,a_upload,a_upload_disp;
    var var_download,a_download,a_download_disp;
    var var_users,a_users,a_users_disp;
    var idt;
    a_upload        = 480;
    a_upload_disp   = 30;
    a_download      = 200;
    a_download_disp = 100;
    a_users         = 400;
    a_users_disp    = 100;

    var_upload   = a_upload + Math.floor(a_upload_disp * Math.random());
    var_download = a_download + Math.floor(a_download_disp * Math.random());
    var_users    = a_users + Math.floor(a_users_disp * Math.random());

    document.getElementById('users').innerHTML    = var_users;
    document.getElementById('upload').innerHTML   = var_upload;
    document.getElementById('download').innerHTML = var_download;

    window.setTimeout('tick()',Math.floor(2000 * Math.random()));
}
tick();