Is there a simple method to tell when the mouse has left the stage

[diagon]

Is there a simple method to know when the mouse has left the stage? I have a flash element on a page consisting mostly of HTML. I need to do the following:

1. Set a timer when the mouse leaves the stage.
2. When the timer is done I need to check if the mouse has returned to the stage AND if not set a close function in motion.
3. If the timer is complete and the mouse is back on stage do nothing.

Thanks in advance!