Reading.js is a crummy bit of CSS and JavaScript that’s supposed to make it easier to read long documents online. (Like this one!)
Include two lines in the <head> of a plain HTML file—the kind produced by pandoc or by most Markdown-to-HTML conversion tools—and gain nifty features like keyboard shortcuts, section folding, and color scheme switching:
<link rel="stylesheet" href="http://baruffio.com/reading.js/stylesheets/reading.css">
<script type="text/javascript" src="http://baruffio.com/reading.js/scripts/reading.min.js"></script>