Tutorial for LMS_SPECIFIED_REDIRECT_EVAL_STATEMENT

I am the developer for an in-house LMS system that primarily uses Articulate presentations.  When the user clicks on the exit button, in Firefox 15 Windows 7, Firefox crashes and dies a horrible death.  It may be how I am embedding the presentation in a dialog box.  However, that is not really the issue.

I really want some javascript to be called when the exit button is pressed so I can handle closing everything myself.  I change the following properties in a file called Configuration.js.  However it doesn't show an alert window as I expected.  I didn't see any javascript errors either.  The exit button just does nothing.  It also doesn't crash with these settings, so I know the settings have taken effect.

var EXIT_BEHAVIOR = "LMS_SPECIFIED_REDIRECT";

var LMS_SPECIFIED_REDIRECT_EVAL_STATEMENT = "alert('hi');";

Could someone point me to some documentation or help me determine where I might be going wrong?