I'm helping to develop a site that displays high resolution images efficiently by using image tiles (similar to the way that google maps works.) e.g. http://www.nextlook.com/public/142/3/photo.shtml?idx=3&of=7 Every modern browser that I've tried is ok except firefox. When firefox it's waiting for an image tile to load it displays a placeholder. This is especially annoying on my site because sometimes (depending on the window size and image size) after I've loaded the initial set of image tiles, I want to invisibly overlay another higher resolution set of tiles. I noticed that there used to be a "SUPPRESS" image attribute in html but it was deprecated and eventually dropped. Can I suppress the placeholders with CSS ? Or some other way ? (I obviously can't change the user's browser setting.)