I agree that js does support the async paradigm for the reason you mentioned; however, at the risk of sounding like I'm speaking for the op js would not be my first choice for system or server side programming. The simple reason being that javascript's behavior is often near inexplicable, many examples can be found here: http://wtfjs.com. I'm tolerant of that strangeness while manipulating the DOM but really only because there are no other choices.