<!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">
  <iframe name='t'></iframe>
  <form target='t' action="dummy_page.html">
    <fieldset disabled>
      <fieldset>
        <input name='i' value='i'>
        <textarea name='t'>t</textarea>
        <select name='s'><option>s</option></select>
      </fieldset>
    </fieldset>
  </form>
</div>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 557087 **/

SimpleTest.waitForExplicitFinish();
addLoadEvent(runTest);

const BASE_URI = `${location.origin}/tests/dom/html/test/dummy_page.html`;
var testResults = [
  BASE_URI + "?",
  BASE_URI + "?",
  BASE_URI + "?i=i&t=t&s=s",
  BASE_URI + "?i=i&t=t&s=s",
];
var gTestCount = 0;

var form = document.forms[0];
var iframe = document.getElementsByTagName('iframe')[0];
var fieldsets = document.getElementsByTagName('fieldset');

function runTest()
{
  iframe.addEventListener("load", function() {
    is(iframe.contentWindow.location.href, testResults[gTestCount],
       testResults[gTestCount] + " should have been loaded");

    switch (++gTestCount) {
      case 1:
        fieldsets[1].disabled = true;
        fieldsets[0].disabled = false;
        form.submit();
        SimpleTest.executeSoon(function() {
          form.submit()
        });
        break;
      case 2:
        fieldsets[0].disabled = false;
        fieldsets[1].disabled = false;
        SimpleTest.executeSoon(function() {
          form.submit()
        });
        break;
      case 3:
        // Elements inside the first legend of a disabled fieldset are submittable.
        fieldsets[0].disabled = true;
        fieldsets[1].disabled = true;
        var legend = document.createElement("legend");
        fieldsets[0].appendChild(legend);
        while (fieldsets[1].firstChild) {
          legend.appendChild(fieldsets[1].firstChild);
        }
        SimpleTest.executeSoon(function() {
          form.submit()
        });
        break;
      default:
        iframe.removeEventListener("load", arguments.callee);
        SimpleTest.executeSoon(SimpleTest.finish);
    }
  });

  form.submit();
}

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