start_slideshow(1, 100, 8000);

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 + "');", 1500);
                setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 1500);
        })
}