The Javascript used by this site is located in external files where its source may be viewed along with comments about the its intent.
Using external files is desirable as:
Overall size of files is smaller as pages repeat less code
It is much easier to maintain
It makes the search engine spider's job easier
If you wish to use any of the code then please go ahead and copy it, Telestrian is not applying any copyright to it. Viewing the source is not possible to stop anyway!
If you experience any browsing problems then please report them to the Webmaster.