Mouse listeners

In my flash project I have numerous buttons that when hovered over or mouseOut an animation of that button happens. Everything works as it should, except if you pull the mouse away from the button very quickly. The animation gets hung up in its own timeline. I know that there is a way for the flash file to repeately check to see if the mouse is still in fact over the button. I couldn’t find anything in the tuturials. If anyone knows the scripting on this, I would greatly appreciate it.