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 + "');", 0);
                setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 0);
            })
        }