Split array

hi,
i m trying to split name of track through live api - but the problem is really my lack of js skills

This gives you the current track name in m4l/Ableton:

var trackname = liveObject.get("name");
log("name:", liveObject.get("name") );
var s = trackname.toString();

Let say, my track is named
"AUDIO 1" -

i only try to split the string of elements : "AUDIO" and "1"
(to evaluate each of them later).

i can't manage to pass it from within js while this would be easy as argument from outside.

I d like to create 2 new var from the string

var a = "AUDIO"
var b = "1"
It considers the whole as a string, so only one argument (i m so bad to js!)

any help?
thx1