Kill button function on Release

Hi, I have a series of buttons [actionscript movie clips - on level 3] on a multi-level flash site. Each button opens a movie on a higher level [level 6]. From this level you can still see level 3 buttons, so i want to ‘kill’ the button functions and then on closing level 6 the button functions will return. Is this possible?

Any ideas much appreciated.

If you’re in AS3:

button.enabled = false;

Or the typical

delete _root.button3.onRelease;

Cheers Guys,

From your code I worked it out. Sorry should have stated its was AS2:

_level3.cont.b1.enabled = 0;

thanks again!