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<h3>WAI-ARIA widget tabbable test</h3>

<ul id="dropdown-menu" role="menu">
  <li role='menuitem'>Menu 1 
      <ul class="submenu" role="menu">
          <li role='menuitem'>Submenu 1-1
              <ul class="submenu" role="menu">
                  <li role='menuitem'>Sub-submenu 1-1-1</li>
              </ul>
          </li>
          <li role='menuitem'>Submenu 1-2</li>
      </ul>
  </li>
  ...
</ul>

<script type="text/javascript">
  UnitTest = {
      ruleIds: [