** from https://github.com/codrops/SidebarTransitions
* 
* sidebarEffects.js v1.0.0
* http://www.codrops.com
*
* Licensed under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
* 
* Copyright 2013, Codrops
* http://www.codrops.com
*/