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() {
        	$('#slideshow' + frame).fadeOut(400);
            if (frame == end_frame || !$('#slideshow' + frame)) { frame = start_frame; } else { frame = frame + 1; }
            setTimeout("$('#slideshow" + frame + "').fadeIn(400);", 400);
            setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 400);
        })
    }