Play movie clip in reverse on rollout

I have movie clip buttons, that on rollover playthrough from frame 2 to 15, then rollout play the animation through til the end to return to the 1st frame. Is it possible to have the movieclip on rollout play through in reverse to the frame 1 and reverse the animation?

Because sometimes you may get to frame 8 or so, and it keeps playing even know you have already rolled out of the movieclip. Is there any code for this or an .fla file someone could give me.

Cheers