Movieclips acting as buttons

programming flash
1

I currently need some movieclips to run some code when released from a mouse click. Currently I have:

this.onRelease = function(){
	//do something when released
}

The problem is I do not want them to recieve the events throughout the duration of the movie. As a result I put this line:

this.onRelease = 0;

once it is no longer wanted or necessary. The problem with this is flash still shows the ‘hand’ cursor icon and not the normal ‘arrow’ cursor icon. How do I get it to show the arrow cursor icon when hovering over these movieclips again? Better yet, is it possible for it to display the arrow cursor icon when hovering over normal buttons and movieclips acting as buttons?

Thanks