[spirit2]

Что-то вроде:

package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.text.TextField;
 
	public class MyButton extends Sprite {
		private var _myText:TextField;
 
		public function MyButton(){
			super();
			this.buttonMode = true;
			this.mouseChildren = false;
 
			_myText = new TextField();
			addChild(_myText);
			_myText.text = "я кнопка"
 
			addEventListener(MouseEvent.MOUSE_OVER, buttonMouseOver);
			addEventListener(MouseEvent.MOUSE_OUT, buttonMouseOut);
			addEventListener(MouseEvent.MOUSE_DOWN, buttonMouseDown);
			addEventListener(MouseEvent.MOUSE_UP, buttonMouseUp);
		}
		private function buttonMouseOver(e:MouseEvent):void{
			_myText.text = "я кнопка"
		}
		private function buttonMouseOut(e:MouseEvent):void{
			_myText.text = "я кнопка и на мне мышь"
		}
		private function buttonMouseDown(e:MouseEvent):void{
			_myText.text = "я кнопка и я нажата"
		}
		private function buttonMouseUp(e:MouseEvent):void{
			_myText.text = "я кнопка"
		}
	}
}