If it is possible, I think you would need to go with Javascript function and CSS which would do the same thing as the adobe flash. Personally I block flash content and don't really care about it, even though some people turns off Javascript, but I guess most of websites for them doesn't work.So I would go with Javascript and CSS to accomplish image transition.I personally am using jQuery Cycle plugin, which is easy to implement and is really good to use, is cross browser, even works on IE6 :)http://jquery.malsup.com/cycle/