Also see the material on Blackboard.
XHTML and CSS
HTML Dog
HTML Dog: The Best-Practice Guide to XHTML and CSS by Patrick Griffiths
A great book that is accompanied by a web site with lots of information.
Bulletproof Web Design
Bulletproof Web Design by Dan Cederholm.
A book focusing on making accessible web pages that can deal with all kinds of display szenarios without falling apart.
Example code can be downloaded from this web site.
CSS Zen Garden
A web site demonstrating what can be accomplished with CSS design.
PHP and MySQL
PHP Solutions
PHP Solutions: Dynamic Web Design Made Easy by David Powers
This book is accompanied by an example page illustrating the concepts taught in the book. And you can download the source code.
php.net
Javascript
DOM Scripting
DOM Scripting: Web Design with JavaScript and the Document Object Model by Jeremy Keith
Ajax
Bulletproof Ajax
Bulletproof Ajax by Jeremy Keith