<svg xmlns="http://www.w3.org/2000/svg">
  <text xml:lang="en" x="50%" y="10%" text-anchor="middle" fill="blue">
    Click the circle below.  If the color of the circle has changed to green,
    then your browser passes this test.
  </text>
  <style type="text/css">
    circle {
      fill: blue;
    }
  </style>
  <circle cx="50%" cy="50%" r="20%" onclick="
    document.getElementsByTagNameNS ('http://www.w3.org/2000/svg', 'style')[0]
        .textContent = 'circle { fill: green }';
  "/>
</svg>
