[КорДум]

Не пишите в кадрах.

var i:int;
for (var i:int = 1; i <= 9; i++) {
	var a:MovieClip = getChildByName("a" + i) as MovieClip;
	a.addEventListener(MouseEvent.MOUSE_OVER, over);
	a.addEventListener(MouseEvent.MOUSE_OUT, out);
}
 
function over (e:MouseEvent):void {
	(e.currentTarget as MovieClip).alpha = .3;
}
 
function out (e:MouseEvent):void { 
	(e.currentTarget as MovieClip).alpha = 1;
}