How can I tame ".onEnterFrame = function()"?

In one frame I have: boxOne.onEnterFrame = function() { ... }

Among other things, it tweens the _alpha of boxOne.

The problem I am having is that once the desired effect is acheived with the onEnterFrame function, it interupts another function trying to alter the _alpha. From what I understand, onEnterFrame means that the function is evoked for each frame after the event handler is called. So, how do I stop it? And by "it", I mean the conditional loops that are running, checking to make sure that boxOne._alpha == x.

Not quite sure exactly what you're trying to do, but you can get rid of the function altogether by using:

delete boxOne.onEnterFrame;

or

boxOne.onEnterFrame = null;

Alternatively, if you don't want to wipe out the entire function, you need to put the statements that should only happen under certain conditions within some sort of conditional structure like an "if...else" or a "while" loop, etc.

Hope this helps. Like I said, I'm not too sure exactly what you were after.