highlight a column
<p>I saw in one of the jQuery books where you can highlight a column that's being sorted.</p>

<pre><code>$('th.sortable').click(function() {
    var $th = $(this);
    var column = $th.index();
    var $table = $th.closest('table');
    var rows = $table.find('tr:not(:has(th))').get();
</code></pre>

<p>Q: How do I add the 'hightlight' class to every cell in the column that was clicked?</p>
