315620-1b.html - mozsearch

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<html>

<head>

  <style>

    div { background: red; height: 3em; }

    div:empty { background: lime; }

  </style>

</head>

<body>

  <div style="display: none"></div>

  <script>

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

    div.appendChild(document.createTextNode("aa"));

    div.style.display = "";

  </script>

</body>

</html>