function start_slideshow(start_frame, end_frame, delay) {
    setTimeout(switch_slides(start_frame,start_frame,end_frame, delay), delay);
}

function switch_slides(frame, start_frame, end_frame, delay) {
    return (
        function() {
            Effect.Fade('slideshow' + frame);
            if (frame == end_frame) {
                frame = start_frame;
            } else {
                frame = frame + 1;
            }

            setTimeout("Effect.Appear('slideshow" + frame + "');",1000);
            setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 1000);
        }
    )
}