被点击mc可以拖动 自动到最上层

/*舞台上有三个mc*/
import flash.events.MouseEvent;

mc1.addEventListener(MouseEvent.MOUSE_DOWN,_onMouseDown);
mc2.addEventListener(MouseEvent.MOUSE_DOWN,_onMouseDown);
mc3.addEventListener(MouseEvent.MOUSE_DOWN,_onMouseDown);

mc1.addEventListener(MouseEvent.MOUSE_UP,_onMouseUp);
mc2.addEventListener(MouseEvent.MOUSE_UP,_onMouseUp);
mc3.addEventListener(MouseEvent.MOUSE_UP,_onMouseUp);

function _onMouseDown(e:MouseEvent):void
{
	//trace(e.target.parent.numChildren-1)
	e.target.startDrag();
	e.target.parent.setChildIndex(e.target,e.target.parent.numChildren-1);
}

function _onMouseUp(e:MouseEvent):void
{
	e.target.stopDrag();
}