gecko/browser/components/sessionstore/test/browser_459906_sample.html

<!-- Testcase originally by David Bloom <bloom@google.com> -->

<!DOCTYPE html>
<title>Test for bug 459906</title>

<body>
<iframe src="data:text/html,not_on_localhost"></iframe>
<iframe></iframe>

<script type="application/javascript">
  var loadCount = 0;
  frames[0].addEventListener("DOMContentLoaded", handleLoad, false);
  frames[1].addEventListener("DOMContentLoaded", handleLoad, false);
  function handleLoad() {
    if (++loadCount < 2)
      return;
    frames[0].removeEventListener("DOMContentLoaded", handleLoad, false);
    frames[1].removeEventListener("DOMContentLoaded", handleLoad, false);
    frames[0].document.designMode = "on";
    frames[0].document.__defineGetter__("designMode", function() {
      // inject a cross domain file ...
      var documentInjected = false;
      document.getElementsByTagName("iframe")[0].onload =
        function() { documentInjected = true; };
      frames[0].location = "browser_459906_empty.html";

      // ... and ensure that it has time to load
      for (var c = 0; !documentInjected && c < 20; c++) {
        var r = new XMLHttpRequest();
        r.open("GET", location.href, false);
        r.overrideMimeType("text/plain");
        r.send(null);
      }

      return "on";
    });

    frames[1].document.designMode = "on";
  };
</script>
</body>