#tb { position:fixed;
    top:0px; left:0px;
    background-image:url(http://www.robelix.com/pix/bg/hintergrund_hoch.png);
    height:110px; min-width:500px; width:100%;
    padding:0px; margin:0px;
    white-space:nowrap;
}

#mb { position:fixed;
    top:110px; left:0px;
    margin:0px; padding:0px;
    width:110px; height:100%;
    background-image:url(http://www.robelix.com/pix/bg/bg_q_xl.png);
    border-width:thin;
}