Try cutting and pasting this column into an email message. Stylesheets give Web designers a simple way to specify fonts, weights, sizes, leading, margins, and a multitude of other style parameters. Another big win with stylesheets is that sites can use them to separate style from content. That's because you can store stylesheets inside your HTML documents, or in separate files all their own. You can change the look of an entire site by changing a single file.
Users can even define their own styles, which get cascaded onto the current styles.
For example, you might have a style for people who are visually impaired that changes fonts or makes text bigger or even changes voices and intonations on a screen reader. With any luck, the cascading stylesheet standard will be a strong part of the Web's future. It's already in Microsoft's Internet Explorer. And while Netscape didn't build CSS into Navigator 3.0, Lilley says that Netscape's developers have been asking all the right questions. As things stand, Netscape has finally implemented CSS in the second prerelease version of Navigator 4.0.