content/test/data/accessibility/event/listbox-next.html

<!DOCTYPE html>
<html>
<body>
<select size=3>
  <option selected>Apple</option>
  <option>Orange</option>
  <option>Banana</option>
</select>
<script>
  document.querySelector('select').focus();
  function go() {
    document.querySelector('select').selectedIndex = 1;
  }
</script>
</body>
</html>