The control elements used to navigate this site are located in two frames:

By clicking on one of the images (or links) in the top frame the corresponding part of the site index tree will be completely expanded, and all other parts will collapse.
The index tree can also be expanded and collapsed item by item by just clicking on those items.
By clicking on the two buttons at the bottom of the site index the whole index tree will expand and collapse, thus showing all pages of this site or just the five main parts respectively.

For people who don't like frames or JavaScript controlled navigation systems there is also a non-frames version of this web-site. Please note however that the pages of this site were designed for the use in frames, so navigating the non-frames version can be uncomfortable now and then.

Last updated on: 17.10.2001 by Jint Nijman