jQuery 1.8.3, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
https://coderwall.com/p/rdgorw
jQuery 1.7.2, HTML, CSS, JavaScript
jQuery 1.11.0, HTML, CSS, JavaScript
Improve
Minimized Problems on Login
jQuery (edge), HTML, CSS, JavaScript
Codrops / Jquery Version
http://demosthenes.info/blog/908/The-First-CSS-Variable-currentColor
Mootools 1.4.1, HTML, CSS, JavaScript
See also http://wicky.nillia.ms/headroom.js/playroom/