<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <title>menclose top</title>
    <meta charset="utf-8"/>
    <script type="text/javascript">
      function doTest()
      {
        var box = document.getElementById("box").getBoundingClientRect();
        document.getElementById("path").setAttribute("d",
        "M" + (box.left + "," + box.top) + " " +
        "l" + (box.width + "," + 0));
        document.documentElement.removeAttribute("class");
      }
      window.addEventListener("MozReftestInvalidate",doTest, false);
    </script>
  </head>
  <body>

    <div style="position: absolute; left: 20px; top: 20px;">
      <math>
        <mphantom>
          <menclose id="box" notation="top">
            <mspace width="200px" height="100px"></mspace>
          </menclose>
        </mphantom>
      </math>
    </div>

    <div style="position: absolute; left: 0px; top: 0px;">
      <svg width="500px" height="500px">
        <path id="path" style="fill: none; stroke-width: 3px; stroke: green; stroke-linecap: round; shape-rendering: crispEdges;"></path>
      </svg>
    </div>

  </body>
</html>