If you can only get 1 macromedia flash howto book, get this one. Very clear.
For an online resource, see Introduction to Apache webmonkey tutorial and Apache Core Features. Apache 1.3.20 is now available for download.
Good beginning point for javascript
get pretested code - 2nd edition was excellent
written by designers of CSS & XML
Like them by the pound? Actually its a good intermediate text.
A must to learn CGI and later reference.
I own and use all of O'Reillys Definitive series - good references