Movie clip that plays in reverse on rollout

I have the following code which is applied to the movieclip

on(rollOver){

_root.over = true;

_root.off = false;

}

on(rollOut){

_root.over = false;

_root.off = true;

}

onClipEvent(enterFrame){

if ((_root.over)&&(this._currentframe <= 10)){

    this.gotoAndStop(this._currentframe + 1);

}

if ((_root.off)&&(this._currentframe >= 1)){

    this.gotoAndStop(this._currentframe - 1);

}

}

I am trying to target the instance for the movie clip as when I apply the code it just plays all the movie clips rather than the instances of the buttons. Could you help me edit the code to target the movie clip that I apply the code too.