JSFiddle - React, Tailwind, and code Playground
HTML
<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-tooltip.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-popover.js"></script>
<div class="container">
<div class="row" style="padding-top: 240px;">
<a href="#" class="btn btn-large btn-primary" rel="popover"
data-content="<form><input type="text"/></form>"
data-placement="top" data-original-title="Fill in form">Open form</a>
</div>
</div>
JavaScript
$('a[rel=popover]').popover()