Question about Tween Class

Is anyone familiar with using Tween Class for animating objects in Flash?

Here is my question…

I’ve used a tween class to animate a movie clip.

Then, I’m using:

myTween.onMotionFinished = function (){
	this.yoyo();
}

To tell when my clip has finished tweening, and reverse the animation to send it back to its starting position.

My question is, is there any way to tell when the result of “yoyo” has completed? Ie: when the clip has returned to its starting position?

Thanks!
Elliott