var tdelay = 8000;

function start_slideshow(tdelay) {
	setTimeout(fadeInOut(tdelay), tdelay);
}

function fadeInOut(tdelay) {
	return(function() {
		   lis = $$('#slide-images>li');
		   new Effect.Fade(lis[0]);
		   new Effect.Appear(lis[1], { duration: 2, afterFinish: function(obj) {
							 lisFade = lis[0].remove();
							 lisFade.hide();
							 $('slide-images').appendChild(lisFade);
							 start_slideshow(tdelay);
							 }});
		   })
}

Event.observe(document, 'dom:loaded', function() {
			  var lis = $$('#slide-images>li');
			  if(lis.length > 1) for(i = 1; i < lis.length; i++) lis[i].hide();
			  });

Event.observe(window, 'load', function() {
			  if($$('#slide-images>li').length > 1) start_slideshow(tdelay);
});