function showTopbar() {

    var theImages = new Array() // do not change this

    theImages[0] = 'main_top_bar_1.jpg'
    theImages[1] = 'main_top_bar_2.jpg'
    theImages[2] = 'main_top_bar_3.jpg'
    theImages[3] = 'main_top_bar_4.jpg'
    theImages[4] = 'main_top_bar_5.jpg'
    theImages[5] = 'main_top_bar_6.jpg'
    theImages[6] = 'main_top_bar_7.jpg'

    // do not edit anything below this line

    var j = 0
    var p = theImages.length;
    
    /*var preBuffer = new Array()

    for (i = 0; i < p; i++) {
        preBuffer[i] = new Image()
        preBuffer[i].src = theImages[i]
    }*/

    var whichImage = Math.round(Math.random() * (p - 1));
        //document.write('<img src=img/"' + theImages[whichImage] + '">');
    document.images["topbarimg"].src = "img/" + theImages[whichImage];

}