Detecting Mouse Outside of SWF?

Im having a problem with some rollover code im using for a movieClip, basically if the mouse runs over to fast the rollover animation is played but not the rollout as the mouse has left the SWF area. Is there anyway of telling where the mouse is on the screen so i can run a check to see if its in the swf or not and then run code accordingly. That make sense?

Cheers.