you seem having problem... well, as far as i remember its from hackits.de
personally, i think that java script is not very good for such kind of task. any other programmin language will make it much easier for you
i have written program in free pascal ( ) with quite short code and found the answer with no problems.

Maybe, but that js code isn't very complex and long, is it?

i hate java script. i need it but i hate it... dont know, why and better dont ask

i know good C but i cant find a decent free compiler out of MS DOS. I hate MS DOS.