Images DCN web philosophy is content-oriented. Images should not be used for page decoration. Use GIF-format images except for photographic art. Try to draw all graphics on the same page with the same palette. If image maps are required, use client-side image maps that fall back to server image maps.
Animation makes it hard to read nearby content.
If it's used, animation should stop after a single iteration. We use HTML 3.2 as coding standard. We are committed to providing content that is legible via Lynx. If a given page just won't work with Lynx, provide a text-based alternative. Make sure your designs look good in both.