Embed a JavaScript engine in an iOS application

I wonder if anyone has successfully ported a javascript engine/interpreter to iOS. I'm writing an iPhone game that I would like to use Javascript as the high-level scripting language (AI, gameplay, etc.), but to do that, I need to compile the JS engine into a static library and link it against my objectiveC program for iPhone OS. There are some candidate JS engine I'm looking at but I couldn't fin

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“JavaScriptCore-iOS iMonkey It is absolutely possible to build and ship a JavaScript engine with your iOS app, see http://www.phoboslab.org/log/2011/04/ios-and-javascript-for-real-this-time.”