Combined Code
	frame 1 {
		stop();
		forward_btn.onRelease = function () {
			var v2 = _root._currentFrame;
			if (v2 < 4) {
				++v2;
			}
			gotoAndStop(v2);
		};
		back_btn.onRelease = function () {
			var v2 = _root._currentFrame;
			if (v2 > 1) {
				--v2;
			}
			gotoAndStop(v2);
		};
	}