apply class to parent li in nestled order lists

apply class to parent li in nestled order lists

I am following this article http://docs.jquery.com/Tutorials:Auto-Selecting_Navigation

I am able to successfully add a  class  to the active page li menu item but does anyone know how to modify or add to this  script  so that any parent menu li items also get the active  class?

I would like to avoid having to add ID's as the menu items will be changing alot

My menus have three levels max

here is my menu structure and  code  so far

* Menu *

<ul class="topLevel">
  <li><a href="/home.html">one</a></li>
  <li><a href="/main-two.html">two</a></li>
  <li><a href="/main-three.html">three</a></li>
  <li><a href="/four/index.cfm">four (parent)</a>
    <ul class="secondLevel">
      <li><a href="/four/one.html">four-one</a></li>
      <li><a href="/four/two.html">four-two</a></li>
      <li><a href="/four/three.html">four-three</a></li>
      <li><a href="/four/four.html">four-four</a></li>
      <li><a href="/four/five/index.cfm">four-five (parent)</a>
        <ul class="thirdLevel">
          <li><a href="/four/five/one.html">four-five-one</a></li>
          <li><a href="/four/five/two.html">four-five-two</a></li>
          <li><a href="/four/five/three.html">four-five-three</a></li>
          <li><a href="/four/five/four.html">four-five-four</a></li>
          <li><a href="/four/five/five.html">four-five-five</a></li>
        </ul>
      </li>
      <li><a href="/four/five.html">four-five</a></li>
    </ul>
  </li>
  <li><a href="main-five.html">five</a></li>
</ul>

 
 $(function(){
   var path = location.pathname.substring(1);
   if ( path )
     $('.topLevel a[href$="' + path + '"]').attr('class', 'underline');
 });

which works on the current page li a

I thought I could go this route

$('.topLevel a[href$="' + path + '"]').attr('class', 'underline').parent().attr('class', 'underline');


but it does not seem to work any ideas?

a working example can be found here























































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