Round corners. Something that should be easy, right? Not so much. It seems they were left out of the CSS specification. No matter, there are a couple of ways to hack them out and make them look good. Basically there are two techniques: layering a few empty tags, and using images. There are some ways to do it with javascript as well, but I wont cover them because javascript is unnecessary. The layering technique is the most concise and clean, IMO, so thats what this post will focus on.