Issues:
<!DOCTYPE html>
<html>
<head>
<title>Dirty Markup · Tidy up your HTML, CSS, and JavaScript code</title>
<meta charset="utf-8">
<meta name="description" content="A web-based interface for cleaning your dirty markup.">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<link rel="shortcut icon" href="/favicon.ico">
<link rel="stylesheet" href="/src/style/css/screen.css">
<script type="text/javascript" src="/src/script/min/lib.min.js"></script>
<script type="text/javascript" src="/src/script/min/dirty-markup.min.js"></script>
</head>
<body>
<form action="/src/ajax/dirty.ajax.php" method="post" id="dirtymarkup-form">
<textarea name="code" id="textarea-editor" wrap="off"></textarea>
<div id="editor"></div>
<div id="sidebar">
<h1 id="logo">
<img src="/src/img/logo.png" alt="Dirty Markup">
</h1>
<p class="instructions text-center">
<small>Paste in your dirty code and hit clean</small>
</p>
<div id="cleanup-mode" class="clearfix">
<div class="btn-group">
<button class="btn btn-default" type="button" data-mode="html">HTML</button>
<button class="btn btn-default" type="button" data-mode="css">CSS</button>
<button class="btn btn-default" type="button" data-mode="javascript">JS</button>
</div>
</div>
<div class="form-group hidden" data-show-for="html">
<label class="control-label" for="page-type">Output</label>
...
</html>