function slidePictures(nr) {
    var cnt = bilderStartseite.length;

    document.getElementById("imgstartseite").src = 'upload/images/CMSEditor/startseite/home' + nr + '.jpg';

    if(nr == cnt)
        setTimeout("slidePictures(" + 1 + ");",3000);
    else
        setTimeout("slidePictures(" + (nr+1) + ");",3000);
}