Sorry, but I didn't create any web interface for that back in 1997. :-) Instead, I wrote a C program to generate those HTML files. More information on that is here:
http://home.wtal.de/ss/html/pnmtohtml/pnmtohtml.html - Sorry, in German. Maybe Google translate might be of some use:
http://translate.google.de/translate?js=n&prev=_t&hl...