Quick question

Im using the AS from the advanced button tutorial and I want to know how to delete the onEnterFrame function without killing the button animation.

heres the AS that makes the button work…

//all this code is inside the complex button so you can stick as many as you want 
//on the stage and all will work.. they all will have this code in it..

stop(); // stop the movie clip from playing (stop button from growing, we want that when the mouse rolls over only
											 
this.onEnterFrame = function(){
	if(rewind == true){   //if rewind switch is set to true play backwards
		prevFrame();        // play backwards
	} 
}

this.onRollOver = function(){
	rewind = false; //set variable (or switch) that decides wether ot not to play backwards...
	play();    // play this movie clip.. (grow the button(tween));
}

this.onRollOut = function(){
	rewind = true;    //set or rewind switch to true so it will play backwards...
}

this.onRelease = function(){
	getURL("events_and_updates.html", '_blank');
}

I know its probably something really easy. any help is much appreciated.