// Javascript document

    function start_slideshow(slideshow_no, start_frame, end_frame, delay) {
        setTimeout(switch_slides(slideshow_no, start_frame,start_frame,end_frame, delay), delay);
    }
                            
    function switch_slides(slideshow_no, frame, start_frame, end_frame, delay) {
        return (function() {
            Effect.Fade('slideshow' + slideshow_no + '_' + frame);
            if (frame == end_frame) { frame = start_frame; } else { frame = frame + 1; }
            Effect.Appear('slideshow' + slideshow_no + '_' + frame);
            setTimeout(switch_slides(slideshow_no, frame, start_frame, end_frame, delay), delay + 850);
        })
    }