SRS, Mudcat is not written in JavaScript. I think there may be a couple of example of client side usage but that's about it. The main work is done in the costly but effective ColdFusion.
Personally, I prefer to avoid client side JavaScript as it is browser dependent and I for one have a tendency to turn it off. I don't need to be show "clever" mouse trails for example... and I'm not too keen over what I think could be done by a malicious user.
MS, at least for ASP did pioneer thier own version of JavaScript called JScript so I suppose the war to some extent does exist or did.