title: How to get mouse and keyboard events, masked by PopUpManager
body: <p>I am implementing an application timeout feature (flex4).  What I am finding is that mouse and keyboard events, which I have listened to with :</p>
  
  <pre><code>FlexGlobals.topLevelApplication.addEventListener(MouseEvent.MOUSE_MOVE, resetLastActivity);
  FlexGlobals.topLevelApplication.addEventListener(KeyboardEvent.KEY_DOWN, resetLastActivity);
  </code></pre>
  
  <p>are being masked by the existence of any popup windows.  The code is in a component, in the constructor. The component is added to the main application in the  block.</p>
  
  <p>How can I get these system generated events to not get stopped by PopUpManager display objects?</p>
  
  <p>Thanks!</p>