1. Other Important Stuff

2. Validating Websites Why? Valid markup will be displayed correctly in your webbrowser. It is accessible for people all over the world. How? Paste your XHTML and CSS code into a validator and check the results. For most problems, a solution will be suggested.

4. Doctype Definition...

5. Solving Problems Tutorials and Search Engines http://www.w3schools.com/html http://www.w3schools.com/html (in English) http://www.w3.org/2002/03/tutorialshttp://www.w3.org/2002/03/tutorials (in English) http://de.selfhtml.org/http://de.selfhtml.org/ (in German) Quiz: http://www.w3schools.com/quiztest/quiztest. asp?qtest=HTML http://www.w3schools.com/quiztest/quiztest. asp?qtest=HTML