> The problem is that only get the html pages but not the 
> jpeg's. If you look at this page you will see a lot of 
> javascript code!
> Any ideas?
The javascript code is not obvious for httrack:
javascript:getWall
('wallpaper_beyond_good_and_evil_02_800.jpg')
And then, the getWall function forms the URL using a query-
string based URL.

You won't be able to download that with httrack, 
unfortunately :(