Links - Designing webpages

SelfHTML, a vast website regarding the Hyper Text Markup Language. Containing a tutorial for HTML beginners and a neat reference of all HTML commands. Very useful in the process of webpage design. (in German)
http://de.selfhtml.org/index.htm

SelfPHP, like SelfHTML, a vast website regarding PHP. Also very useful in the process of webpage design, as a reference to all PHP commands. (in German)
http://www.selfphp.info/

W3C Validator, a website concering HTML conformance. Check if your own website is conformant to the HTML language specification.
http://validator.w3.org/

Flashforum, one of the biggest resources about web desig, with a strong focus on Flash. (in German)
http://www.flashforum.de/

php-center.de, a website with tons of information about PHP.
http://www.php-center.de/

Online version of a JavaSript pocket book from Ralph Steyer (in German).
http://www.softwareacademy.de/javascripttb/