jQuery 1.9.1, HTML, CSS, JavaScript
evenly distributed, inherited witdh, transitions
Just a simple 'scroll to top' widget that fades in as the viewer scrolls down the page.
Mootools 1.4.5, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 2.0.2, HTML, CSS, JavaScript
jQuery 2.1.3, HTML, CSS, JavaScript