Actionscript button ON/OFF switch

// Button states
// Use: firstframe of movieclip _parent.buttonStates(_name);
// Result: first click turns button on, second click turns button off
//
function buttonStates(n) {
     this[n].stop();
     this[n].state = false;
     this[n].onRollOver = function() {
          this._parent[n].gotoAndStop(2);
     };
     this[n].onRollOut = this[n].onReleaseOutside = function () {
          if (this._parent[n].state) {
               this._parent[n].gotoAndStop(2);
          } else {
               this._parent[n].gotoAndStop(1);
          }
     };
     this[n].onPress = function() {
          this._parent[n].gotoAndStop(3);
          this._parent[n].state = !this._parent[n].state;
     };
     this[n].onRelease = function() {
          if (this._parent[n].state) {
               this._parent[n].gotoAndStop(2);
          } else {
               this._parent[n].gotoAndStop(1);
          }
     };
}