It's not JavaScript, it's UnityScript. Basically since everything that's not compiled to native code is run through Mono. By default Unity provides support for

It's not JavaScript, it's UnityScript. Basically since everything that's not compiled to native code is run through Mono. By default Unity provides support for UnityScript, C#, and Boo. However, since it's just IL all the way down, you can easily use IronPython, IronScheme, ClojureCLR, F#, etc., etc. just as easily.