ActionScript 3.0 :: Flash Player 9 - Popped Up From The Swf Contained In The Main Html Window?

Can anyone tell me if I need to use Actionscript 3 code instead of Actionscript 2 code in the following situation: I am running a swf file which is contained in a browser window (all files are contained on a CD and I have a 'trust' file set up to let them play properly).  Up until now, I have been using the following Actionscript 2 code to close the browser window (the Actionscript 2 code is on an 'Exit' button within the swf):
 
on (release) {getURL("javascript:window.close()");}
 
This Actionscript 2 code has always worked and still works in Flash player 8 and lower.  However, it does nothing when played using Flash player 9.  Can anyone tell me if Flash player 9 won't recognize Actionscript 2 code?  Is it essential to use ONLY Actionscript 3 code if you are using Flash player 9? I am having the same problem when I try to launch another html page containing a swf (popped up from the swf contained in the main html window).I have the following code on the button to launch the popup html window.It always worked, but suddenly no longer works with Flash player 9.Here is the code I am using:
 
 
on (release) {   getURL("javascript:launchWin2('webpage2.html');");
}

I have all the necessary background code to launch 'webpage2.html'.It works everywhere except in Flash player 9.