How to disable or hide the full screen navigation bar with javascript

[datro]

My PDF is intended for full-screen viewing and includes my own buttons for navigation.  In Full Screen mode, Acrobat Reader is placing three "invisible" navigation buttons in the lower left of the screen which appear with a mouse over.

I want to disable this behavior and prevent showing these buttons when the mouse is in that corner when in FullScreen mode.  Is this possible with JavaScript?  I've tried using

app.executeMenuItem("ShowHideToolbarNavigation");

in my own button javascript for toggling FullScreen mode but it doesn't seem to do anything.

Any ideas how I can disable these navigation buttons from appearing?

[datro]

Sorry, I meant "app.execMenuItem...."