jquery .find issue
<p>I'm moving down a table using the up/down arrow keys.  I am manipulating the class of the <code>&lt;tr&gt;</code> tags to change the CSS class (highlighted/non-highlighted).  I noticed when the screen loads and I click the arrow keys the first time <code>tr_lst.attr('id')</code> has a value but after the 2nd click it says it is undefined.</p>

<p>I think it has something to do with the manipulation of the CSS in the javascript code.  Any ideas on how I can get this to print out a value after every keypress?</p>

<pre><code>    var tr_lst = $('#' + ListBoxVal).find('tr[class="LUGridRowHighlight"]');
    console.log('tr_lst id: ' + tr_lst.attr('id'));
</code></pre>
