function start_slideshow(start_frame, end_frame, delay) {
		for(i=start_frame; i<=end_frame; i++) {
			img = $('slide-'+i);
			if(i>1)
				img.style.display='none';
		}
	
		setTimeout(switch_slides(start_frame,start_frame,end_frame, delay), delay);
}
												
function switch_slides(frame, start_frame, end_frame, delay) {
		return (function() {				
				$('slide-' + frame).style.display='none';
				if (frame == end_frame) { frame = start_frame; } else { frame = frame + 1; }
				setTimeout("$('slide-" + frame + "').style.display ='';", 100);
				setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 850);
		})
}