function galerie(galerie,direction) {
    var div = document.getElementById("galerie_"+galerie);
    if (!div)
        return;
    var images = div.childNodes;
    var image;
    var position=-1;
    for (var i=0; i<images.length; i++) {
        image = images[i];
        if (image.style.display=="block" || image.style.display=="") {
            position = i;
            i = images.length;
        }
    }
    if (position==-1)
        return;
    position += direction;
    if (position>images.length-5)
        position=images.length-5;
    if (position<0)
        position=0;
    for (i=0; i<images.length; i++) {
        image = images[i];
        if (i<position || i>position+4) //für 5 Bilder
            image.style.display = "none";
        else
            image.style.display = "block";
    }
    image = document.getElementById("galerie_"+galerie+"_pfeillinks");
    if (position == 0)
        image.src = "img/pfeillinks_grau.png";
    else
        image.src = "img/pfeillinks_rot.png";
    image = document.getElementById("galerie_"+galerie+"_pfeilrechts");
    if (position+5 >= images.length)
        image.src = "img/pfeilrechts_grau.png";
    else
        image.src = "img/pfeilrechts_rot.png";
}