No, AFAICS there's no JS at all in either this page or the "Add Comment" page. One HTML file, one CSS file and a couple of tiny GIFs; that's it.
EDIT: oops, tell a lie, there's a tiny inline snippet to do voting.
That simplicity (both the lack of client-side dynamics and the lack of unnecessary images) renders nice and fast, too. Too many sites waste time with "shiny" javascript tricks, way too many images and other bloat.