Zooming via jsfl?

Hi all,
I am setting up a Custom Command, but I have problems when I run it that some of the buttons that I create show up at the bottom of the viewable screen. let me explain. I have a button that is supposed to show up at the bottom of the stage. It works fine when the stage is viewable. But let’s say I have the stage at 400% focused in on the top of the stage, the buttons will show up in the center of the stage because that was the bottom of the viewable stage.

All this being said, I am looking for a way to set the zoom via JSFL?

Any help would be greatly appreciated.

Ro