elevator.js
A "back to top" button that behaves like a real elevator
...Elevator.js is a stand alone library (no jquery, or the likes) so usage is pretty straight forward. All styling of elements is up to you. Elevator.js only handles the audio management, and the scroll functionality! Elevator.js lives entirely within the js realm, which makes things fairly simple to use. You'll need to create a new instance of Elevator, and pass it some audio elements. Elevator.js is covered by the MIT License.