The HTML source validates as HTML 4.01 Transitional. I tested the pages several times while working on them; it seems like I have fixed everything.
All the CSS complies to the specifications of the W3C.
The complete web is coded in PHP5. Several subroutines make the handling and updates easier than it would be by using plain HTML only. This goes especially for links and images.
A MySQL database running in the background stores serveral parts of this web, like News, Links and Comments. All data can be edited easily through a webinterface.