arr = new Array();
function preloadMenu(){
    preloadImage('/img/buttons/bestellen_hl.gif');
    preloadImage('/img/buttons/bestellen2_hl.gif');
    preloadImage('/img/buttons/bekijken2_hl.gif');
    preloadImage('/img/buttons/bekijken_hl.gif');
    preloadImage('/img/buttons/aanvullen_hl.gif');
    preloadImage('/img/buttons/ecard_hl.gif');
}

function preloadImage(src){
    n = arr.length;
    arr[n] = new Image;
    arr[n].src = src;
}