Technical information

Standards, Formats, Protocols

This site uses HTML4 (with some HTML5 extensions) and CSS2 (with some CSS3 extensions) as well as MathML 2.0 (if supported by the browser). A few older browsers (especially Internet Explorer) do not process CSS2 correctly, so with these the presentation of this site may be slightly different.

A few pictures in PNG format are used. Very old browsers do not understand this format at all, and some older browsers (again, Internet Explorer) misinterpret the transparency information in these pictures. So these pictures may not be displayed correctly with these browsers.

Your browser identifies itself as:

CCBot/2.0 (

The web server supports HTTP 1.1. It's also compatible with browsers and proxies using HTTP 1.0 and HTTP 0.9, but you may experience lower performance with these.

Your browser/proxy uses:


For many advanced functions Javascript is required.


Cookies are used for a few functions, especially the language selection, the contact form and the guestbook. If your browser doesn't accept cookies you can not use these functions.


Browser notes:

Mozilla Firefox
I recommend using Firefox 8 or later. There are no known issues for the latest version.
MS Internet Explorer
IE 6 is a stone age browser. Nobody should be using it. IE 7 has massive problems with CSS2 and PNG. There are problems when viewing pages with Google Translate and Live Translate. IE 8 has fewer problems, but despite Microsoft's claims, IE 8 is still not standards compliant and has severe rendering bugs. IE 9 has resolved some and added new problems. This web site contains many workarounds for IE. Some functionality is restricted when using IE. I strongly recommend using a decent browser instead of IE.
The latest Opera version has some Javascript problems. Functionality is slightly restricted.
Google Chrome
Older versions have minor problems with CSS. Version 10 or later is fine.
Version 4 has minor problems with CSS. Version 5 works fine.

Technical problems? Pages are not displayed correctly? Link is broken? Please send me a message! Don't forget to name your browser, browser version and OS.