Reversing frames on button release

aaaaaaaaaand i fixed my own mistake again, lol. if you’re interested, it was this:

workStart.onRelease = function() {
	this.play();
	_root.index.onEnterFrame = function() {
		if (this._currentframe == 15) {
			delete this.onEnterFrame;
		} else {
		this.prevFrame();
		}
	};
};

again, thanks so much for your help.