Tweener Documentation
AS2 and AS3.
Tweener.isTweening(target:Object):Boolean;
target:Object — The target object.
Returns whether the object has any tweening acting on one of its properties or not. Delayed or paused tweenings count as a valid tweening.
Boolean — true if it has any tweening, false otherwise.
// Tell if an object has a tweening.
if (Tweener.isTweening(myMC)) trace ("The object myMC has at least one tweening.");