Selecting element with ID does not work
<pre><code>alert($('#myTableHeader1').width());
alert($('#myTableHeader1').outerWidth());
alert($('#myTableHeader1').innerWidth());
</code></pre>

<p>None of the above works. Even though I have </p>

<pre><code>&lt;th id="myTableHeader1" width="12%"&gt; testest&lt;/th&gt;
</code></pre>

<p>I get the error </p>

<blockquote>
  <p>null is null or not an object</p>
</blockquote>
