The original author has also split the content up into small chunks of a few kilobytes each. I personally would have preferred an 'all in one page' approach with the table of contents linking down the page.

It might be worth mentioning that the only Javascript in the page is on the same domain and appears to consist of some style/folding features

On a side note, how hard would it be to write a WordPress extension that generates static HTML every time you write a new post or a new comment gets approved/submitted?