Help Needed

Very easy question just that i don;t know how to do it how would i go about having a mask move with the startdrag and then in another non masked layer have a object following the mask?
So a object ofrm each layer benig dragged by the mouse how do u do tthat?

http://www.kirupaforum.com/forums/showthread.php?s=&threadid=31380

yourClip.onMouseMove = function () {
this._x = this._parent._xmouse ;
this._y = this._parent._ymouse ;
}