How can i find out what type of actionscript a game uses (as2 or as3)?

How can i find out if a Flash game is programmed in as2 (Actionscript 2) or as3 (Actionscript 3), the easiest way possible.





Thanks!!!How can i find out what type of actionscript a game uses (as2 or as3)?
decompile it http://www.sothink.com/product/flashdecompiler/