Zoom control

Does anyone know a javascript that I can use to override to turn the zoom control of a button and radio buttons off and then on? I'd like to make that an option in the popUp Menu list I created. I don't want to turn the zoom completely off, just if all the zooming in and out becomes annoying. The page view jumps from top to bottom. Also, the buttons and radio buttons have a focus javascript and a zoom percentage. I don't know if that provides a bit more info for you folks.

Here's the script that I'm using to jump down:

this.getField("Button27b").setFocus();

this.zoom = 135;

Then there's a radio button down there that reverses the view. There's like 48 radio buttons down page. So, you can see all that zooming and jumping could get annoying. So, I thought to temporarily turn off (or on) the zooming and jumping.