Tantek: High Pass Filter. One of the important things to learn about CSS is the various ways to hide CSS from various browsers. Let me put that another way: one of the best things about CSS is that you can hide CSS from older (or buggy) browsers. This is key in having your web pages degrade gracefully and gradually. The latest browsers see everything, older browsers (like Netscape 4) see something, and you can implement workarounds for buggy browsers (like IE5/Win), but keep these workarounds well-separated from the rest of your code.

