AIR Runtime version comparison / updating

Question

Question #1: Is there any built in function, that could
compare AIR runtime versions. I know the current runtimeversion
that the user has, and I know the version that I developed for. Now
I would like to make sure that the user has the same or newer
version of the runtime.
I can split the runtime version by the periods and compare
each chunk seperatly, byt maybe there is some function in AIR that
would handle it for me?
Question #2: How to update the air runtime? Should I
air.navigateToUrl() the user to :
http://www.adobe.com/go/EN_US-H-GET-AIR
or
http://get.adobe.com/air/?promoid=BUIGQ
and quit the app?

Answer 1

If it will be of any help to anyone, I came up with this for
now:
// Returns false if v2 is greater than v1
// v1,v2 - version numer, period separated, ie. "1.1.0.7876"
function compareVerions(v1,v2)
v1 = v1.split(".");
v2 = v2.split(".");
if (v1.length>v2.length) var cnt = v2.length-1; else var
cnt = v1.length-1;
for (var i=0; i<=cnt; i++) {
var elV1 = parseInt(v1
var elV2 = parseInt(v2);
if ( elV1>elV2 ) return true;
if ( elV1<elV2 ) return false;
return true;