Hit Test or Invisible button

Hit Test or Invisible button.

Hi all,

I’m looking for best way to hide and show the nav on my site when the mouse is within a certain area.

I want the nav to be hidden until the mouse scrolls near the nav and then I want to nav to become visible then invisible again when you scroll away. Is it possible to use the Hit Test Movie Clip method to do this or is it best to use and invisible button and then say something like

invisBtn_btn.onRollover = function(){
  nav_mc._visible = true


I can’t really think how I would do this without using onEnterFrame to test if the mouse was in a certain area, but them onEnterFrame would be running all the time and that’s not a good idea is it.