Strange error. CleanTalk is an anti-spam system we're testing out. I've seen a couple issues with it, they seem fairly rare, but I'm not sure we'll continue with it given those and your experience here.
Do you have any ad or script blocking plugins enabled? How did you add the URL, simply pasting it in directly to the text in your edit window, or did you highlight existing text and add a link to it?
Btw Javascript is very much alive, in fact it is more and more popular. Most of the interactivity or dynamics you see on websites these days are powered by Javascript, rather than older tech like Flash.

- Oshyan