var current_banner = 1;
var bannertime = 10000;

function banner_preload() {
    var img = new Image();
    img.src = '/fileadmin/templates/gfx/start2.jpg';
    img = new Image();
    img.src = '/fileadmin/templates/gfx/start3.jpg';
    img = new Image();
    img.src = '/fileadmin/templates/gfx/start4.jpg';
    img = new Image();
    img.src = '/fileadmin/templates/gfx/start5.jpg';
    img = new Image();
    img.src = '/fileadmin/templates/gfx/start6.jpg';
}

function change_banner() {
    current_banner++;
    if (current_banner > 6) { current_banner = 1; }
    var file = '/fileadmin/templates/gfx/start'+current_banner+'.jpg';
    document.getElementById('banner').src = file;
    window.setTimeout('change_banner()', bannertime);
}

banner_preload();
window.setTimeout('change_banner()', bannertime);