For the first time in one publication, you can now get in-depth reference coverage of HTML, XHTML, Cascading Style Sheets, Dynamic Positioning, Document Object Models, and JavaScript as presented by standards bodies and as implemented in browsers through Internet Explorer 6 for Windows, Internet Explorer 5.x for Macintosh, and Netscape 7.
CSS
ThinkVitamin
Resources for web designers, developers, and entrepreneurs.
The Browser-Safe Web Palette
The Browser-Safe Palette, as Linda Weinman, author of the site and several books, so named it, is the actual palette that Mosaic, Netscape, and Internet Explorer use within their browsers. The palettes used by these browsers are slightly different on Macs and PCs. This palette is based on math, not beauty.
W3C
The World Wide Web Consortium (W3C) develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential. W3C is a forum for information, commerce, communication, and collective
Complete CSS Guide
A complete reference to every aspect of CSS.
Cascading Style Sheets
What the Wikipedia has to say about CSS.
CSS Validation Service
Validate your CSS code with this tool from W3C.
CSS Layout Techniques
Tricks, tips, and techniques on using CSS.