2015-07-142015-07-14 by

smooth scroll

http://www.webdesign-klamonfra.de/codeschnipsel/smoothscroll-zum-seitenanfang.php

http://www.elmastudio.de/wordpress/back-to-top-buttons-mit-smooth-scroll-und-fading-in-wordpress/

http://pixelbar.be/blog/mit-jquery-scrollen-gewusst-wie/