<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=557087
-->
<head>
  <title>Test for Bug 557087</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=557087">Mozilla Bug 557087</a>
<p id="display"></p>
<div id="content" style="display: none">
  <fieldset disabled>
    <input>
  </fieldset>
</div>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 557087 **/

// Testing random stuff following review comments.

var fieldset = document.getElementsByTagName("fieldset")[0];

is(fieldset.elements.length, 1,
   "there should be one element inside the fieldset");
is(fieldset.elements[0], document.getElementsByTagName("input")[0],
   "input should be the element inside the fieldset");

document.body.removeChild(document.getElementById('content'));
is(fieldset.querySelector("input:disabled"), fieldset.elements[0],
   "the input should still be disabled");

fieldset.disabled = false;
is(fieldset.querySelector("input:enabled"), fieldset.elements[0],
   "the input should be enabled");

</script>
</pre>
</body>
</html>
