Internet Explorer 3.x

Internet Explorer 3.x was the first major browser to implement CSS, although only in a rudimentary fashion. It did not implement many CSS properties, and those that were implemented were rarely implemented fully. Very few people use Internet Explorer 3.x today, so it is probably not worthwhile to try and design pages that would look good in it. This is just as well, since designing Web pages that use the few CSS properties implemented in Internet Explorer 3.x is pretty much an exercise in frustration, anyway. In short, don't plan on designing a CSS-oriented Web site that has to be "safe" for whatever Internet Explorer 3.x users are still out there.

For this reason, in the summary listing of "safe" and "unsafe" elements provided at the end of this book, Internet Explorer 3.x is not included, as it would render too many CSS elements as "unsafe."