// start_slideshow(1, 3, 2000);

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 + "');", 850);
                 setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 850);
                })
}