Allow animation to finish on mouseover

Hello:

I’ve created a mouseover effect for a button that has the button quickly fly off the page, and then fly back on. The animation works fine when I put the mouse over the button. But if I remove the mouse from the button hit area during the playing of the animation, the animation stops prematurely and goes back to the Up state. How do I allow the mouseover animation to finish playing regardless of whether or not the user keeps the mouse over the hit area?

Thanks for any help.

Noah