Adobe AIR's AOT compiler for iOS statically compiles a superset of JavaScript called Actionscript 3.0 down to ABC bytecode, then machine code through LLVM. If you were to write your AS3 code without classes and without type annotation, it would essentially be JavaScript, and then the compiler would happily compile it down to machine code. Sadly this is not open source software, and you don't get access to any DOM (which many people think of when they think of JavaScript) because it's running inside essentially a Flash Player instance.
