function chooseMenu(menuId) {
    switch(menuId) {
        case 1:
            document.getElementById('menu_01').src = 'images/carstenjensen/jpgs/CJ_top_left_rollover.jpg';
            break;
        case -1:
            document.getElementById('menu_01').src = 'images/carstenjensen/jpgs/CJ_top_left_alm.jpg';
            break;
        case 2:
            document.getElementById('menu_02').src = 'images/carstenjensen/jpgs/bogen_top_left_rollover.jpg';
            break;
        case -2:
            document.getElementById('menu_02').src = 'images/carstenjensen/jpgs/bogen_top_left_alm.jpg';
            break;
        case 3:
            document.getElementById('menu_03').src = 'images/carstenjensen/jpgs/cj_navi_01_rollover.jpg';
            break;
        case -3:
            document.getElementById('menu_03').src = 'images/carstenjensen/jpgs/cj_navi_01_alm.jpg';
            break;
        case 4:
            document.getElementById('menu_04').src = 'images/carstenjensen/jpgs/bogen_navi_01_rollover.jpg';
            break;
        case -4:
            document.getElementById('menu_04').src = 'images/carstenjensen/jpgs/bogen_navi_01_alm.jpg';
            break;
        case 5:
            document.getElementById('menu_05').src = 'images/carstenjensen/jpgs/cj_navi_02_rollover.jpg';
            break;
        case -5:
            document.getElementById('menu_05').src = 'images/carstenjensen/jpgs/cj_navi_02_alm.jpg';
            break;
        case 6:
            document.getElementById('menu_06').src = 'images/carstenjensen/jpgs/bogen_navi_02_rollover.jpg';
            break;
        case -6:
            document.getElementById('menu_06').src = 'images/carstenjensen/jpgs/bogen_navi_02_alm.jpg';
            break;
        case 7:
            document.getElementById('menu_07').src = 'images/carstenjensen/jpgs/cj_navi_03_rollover.jpg';
            break;
        case -7:
            document.getElementById('menu_07').src = 'images/carstenjensen/jpgs/cj_navi_03_alm.jpg';
            break;
        case 8:
            document.getElementById('menu_08').src = 'images/carstenjensen/jpgs/bogen_navi_03_rollover.jpg';
            break;
        case -8:
            document.getElementById('menu_08').src = 'images/carstenjensen/jpgs/bogen_navi_03_alm.jpg';
            break;
        case 9:
            document.getElementById('menu_09').src = 'images/carstenjensen/jpgs/cj_navi_04_rollover.jpg';
            break;
        case -9:
            document.getElementById('menu_09').src = 'images/carstenjensen/jpgs/cj_navi_04_alm.jpg';
            break;
        case 10:
            document.getElementById('menu_10').src = 'images/carstenjensen/jpgs/bogen_navi_04_rollover.jpg';
            break;
        case -10:
            document.getElementById('menu_10').src = 'images/carstenjensen/jpgs/bogen_navi_04_alm.jpg';
            break;
        case 11:
            document.getElementById('menu_11').src = 'images/carstenjensen/jpgs/cj_navi_05_rollover.jpg';
            break;
        case -11:
            document.getElementById('menu_11').src = 'images/carstenjensen/jpgs/cj_navi_05_alm.jpg';
            break;
        case 12:
            document.getElementById('menu_12').src = 'images/carstenjensen/jpgs/bogen_navi_05_rollover.jpg';
            break;
        case -12:
            document.getElementById('menu_12').src = 'images/carstenjensen/jpgs/bogen_navi_05_alm.jpg';
            break;
        case 13:
            document.getElementById('menu_13').src = 'images/carstenjensen/jpgs/xtra_menu_01_rollover.jpg';
            break;
        case -13:
            document.getElementById('menu_13').src = 'images/carstenjensen/jpgs/xtra_menu_01_alm.jpg';
            break;
        case 14:
            document.getElementById('menu_14').src = 'images/carstenjensen/jpgs/film_over.jpg';
            break;
        case -14:
            document.getElementById('menu_14').src = 'images/carstenjensen/jpgs/film_alm.jpg';
            break;
        case 15:
            document.getElementById('menu_15').src = 'images/carstenjensen/jpgs/xtra_menu_02_rollover.jpg';
            break;
        case -15:
            document.getElementById('menu_15').src = 'images/carstenjensen/jpgs/xtra_menu_02_alm.jpg';
            break;
        case 99:
            document.getElementById('menu_99').src = 'images/carstenjensen/jpgs/buy_book_rollover.jpg';
            break;
        case -99:
            document.getElementById('menu_99').src = 'images/carstenjensen/jpgs/buy_book_alm.jpg';
            break;
        case 100:
            document.getElementById('menu_100').src = 'images/carstenjensen/jpgs/startside/CJ_rollover_startside.jpg';
            break;
        case -100:
            document.getElementById('menu_100').src = 'images/carstenjensen/jpgs/startside/CJ_alm_startside.jpg';
            break;
        case 101:
            document.getElementById('menu_101').src = 'images/carstenjensen/jpgs/startside/bogen_rollover_startside.jpg';
            break;
        case -101:
            document.getElementById('menu_101').src = 'images/carstenjensen/jpgs/startside/bogen_alm_startside.jpg';
            break;
    }
}