This script turns your Loadify.js-enabled anchors into Ajax calls and loads the HTML response into a desired page element. It also uses the HTML5 History API to modify the location accordingly.
The code is based on GitHub's Tree Slider and my own needs.
Load Loadify.js.
<script src="/assets/js/Loadify.js" type="text/javascript"></script>Add data-loadify-target attributes to the anchors you want to enable Loadify.js with the target element where you want to load the response as value.
<a href="usage.html" data-loadify-target="#content">Usage</a>Enjoy.