function start_slideshow(start_frame, end_frame, delay,id) {
        setTimeout(switch_slides(start_frame,start_frame,end_frame, delay, id), delay);
    }
                            
    function switch_slides(frame, start_frame, end_frame, delay, id) {
        return (function() {
            Effect.Fade(id + frame);
            if (frame == end_frame) { frame = start_frame; } else { frame = frame + 1; }
            setTimeout("Effect.Appear('"+ id + frame + "');", 125);
            setTimeout(switch_slides(frame, start_frame, end_frame, delay, id), delay + 850);
        })
    }