JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<p><code>&lt;input /&gt;</code> without .btn-group</p>
<div class="options">
    <input class="btn btn-primary" type="submit" value="Add Person" name="commit" />
    <button class="btn" type="button">Cancel</button>
</div>

<p><code>&lt;input /&gt;</code> with .btn-group</p>
<div class="options btn-group">
    <input class="btn btn-primary" type="submit" value="Add Person" name="commit" />
    <button class="btn" type="button">Cancel</button>
</div>

<p><code>&lt;button type="submit"&gt;</code> with .btn-group</p>
<div class="options btn-group">
    <button class="btn btn-primary" type="submit">Add Person</button>
    <button class="btn" type="button">Cancel</button>
</div>

CSS

body {
    margin: 5px;
}

.options {
    margin-bottom: 40px;
}

JavaScript

/* Twitter bootstrap button alignment */