Can this work?

JavaScript
1

I’m working through the simply JavaScript book, and I’m trying to do my own ‘sort of’ accordion. Here’s the JS code:
[COLOR=“Navy”]var Accord =
{
init: function()
{
var accordions = Core.getElementsByClass(“accordion”);

for(var i = 0; i < accordions.length; i++)
{
var folds = accordions[i].childNodes;

for (var k = 0; k &lt; folds.length; k++)
{
 if (folds[k].nodeType == 1)
 {
  var foldLinks = folds[k].getElementsByTagName("a");
  var foldTitleLink = foldLinks[0];

  Core.addEventListener(foldTitleLink, "mouseout", Accord.hideListener);
  Core.addEventListener(foldTitleLink, "mouseover", Accord.showListener);
 }
}

}
},

collapse: function(fold)
{
Core.removeClass(fold, “expanded”);
Core.addClass(fold, “collapsed”);
},

expand: function(fold)
{
Core.removeClass(fold, “collapsed”);
Core.addClass(fold, “expanded”);
},

hideListener: function
{
var foldHide = this.parentNode;

if (Core.hasClass(foldHide, “expanded”))
{
Accord.collapse(foldHide);
}
else if (Core.hasClass(foldHide, “collapsed”))
{
return;
}
else
{
Accord.collapse(foldHide);
}
},

showListener: function
{
var foldShow = this.parentNode;

if (Core.hasClass(foldShow, “collapsed”))
{
Accord.expand(foldShow);
}
else
{
Accord.collapse(foldShow);
}
}
};

Core.start(Accord);[/COLOR]

And here’s the html code:
<ul class=“accordion”>
<li><a href=“#”>Home</a></li>
<li><a href=“#”>About Us</a></li>
<li><a href=“#”>Sales</a></li>
<li><a href=“#”>Operating Systems</a>
<ul>
<li><a href=“#”>Windows</a></li>
<li><a href=“#”>Ubuntu</a></li>
<li><a href=“#”>Linyx</a></li>
</ul>
</li>
<li><a href=“#”>Images</a></li>
<li><a href=“#”>Browsers</a>
<ul>
<li><a href=“#”>Explorer</a></li>
<li><a href=“#”>Firefox</a></li>
<li><a href=“#”>Chrome</a></li>
<li><a href=“#”>Safari</a></li>
<li><a href=“#”>Opera</a></li>
<li><a href=“#”>Other</a></li>
</ul>
</li>
</ul>

I want to add a class “expanded” or “collapsed” to parent <li> of the “Browsers” and “Operating Systems” <a> tag, like this:

<li class=“expanded”><a href=“#”>Browsers<…

The above JS code doesn’t work.
Please help!