<html>
<head>
  <style>
    span {
        background: blue;
        color: white;
        opacity: .666;
        -webkit-transition: opacity, .25s, .15s ease-out;
    }
  </style>
  <script>
    function checkRunning()
    {
      var current = internals.numberOfActiveAnimations();
      if (current == 0)
        document.getElementById('result').innerHTML = "Number of active animations before transition is (0) as expected";
      else
        document.getElementById('result').innerHTML = "Number of active transitions is (" + current + ") but was expecting (0)";
      testRunner.notifyDone();
    }
    
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
        window.setTimeout(checkRunning, 300);            
    }
  </script>
</head>
<body>

<span id="doomSpan">If you can see this then we didn't hang!!!</span>

<script type="text/javascript" charset="utf-8">
    document.getElementById("doomSpan").style.opacity=1;
</script>

<div id="result">
</div>
</body>
</html>