text: <!DOCTYPE html>
  <html class="reftest-wait">
    <head>
      <script>
        function doTest() {
          document.getElementById('t').setCustomValidity('foo');
          document.documentElement.className='';
        }
        document.addEventListener("MozReftestInvalidate", doTest, false);
      </script>
    </head>
    <!-- Test: if input has a custom error, it should be affected by :-moz-ui-invalid
               pseudo-class. -->
    <link rel='stylesheet' type='text/css' href='style.css'>
    <body>
      <input class='invalid' id='t'>
    </body>
  </html>
  