It would make easier to integrate your game with your site (like posting highscores via jQuery or accessing Kongregate’s/other web game sites APIs).
It could would similarly to C++ functionality and from engine’s standpoint, JavaScript’s eval function could be used.
I was thinking about it. But it won’t use eval ( eval is evil ), but the javascript code will probably be stored in a function that will be called by the events code.
If it’ll work, I don’t care if it will use eval or not.