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);
        })
    }