I've got a few friends that are still very involved in the Flex community which is now at the Apache foundation. Adobe if I remember correctly is still funding staffers to work on Flex many years later. I believe Flex is either the second or third most successful project at Apache in terms of downloads.
I talked to the flex team a couple of years ago - and they did not think this was possible. I wonder how complete it is. At the time they said though Actionscript claims to be ECMAScript it is far from Javascript in very fundamental concepts they are based on such as inheritance and encapsulation (AS) and closures (JS).
