It currently doesn't support all of the characters, but I've done the essential ones, and any others can be done on request.
//Make a new Date object
var date = new Date(1397674088445);
//Get the format
var formatted = date.format("H:i d/m/y");
//Do with it what you want
formatted == "04:48 17/04/14"
//Note the time is AEST, because that is my computer's time.
Milliseconds since Epoch: and string format:
Result: " "
You can download the source from here, or there is also a compacted version (~ 3.5Kb) available here.