Hide custom controls on map?

[Sammy]

Hi
I have created some buttons on my map with the following code:
map.controls[google.maps.ControlPosition.RIGHT_TOP].push(oButton);
How can I hide this control, and show it again?

I did the following, but this deletes the button from the map:
oEl = document.getElementById('btnPathLength');
if (oEl && oEl.parentNode) oEl.parentNode.removeChild(oEl);

Thank you for tips.

[Sammy]

Sorry, I think I found a way already. I've been trying with this and
it never worked
if (oEl) oEl.display = 'none';

and then found out that I need "style", the one below works:
if (oEl) oEl.style.display = 'none';