title: Jquery Tablesorter, sorting by link url rather than link content
body: <p>I am using Tablesorter on a table which uses links in the first column (of 4). The problem is that in FF and Chrome it orders the first column when clicked by url not the content of the link. For example</p>
  
  <pre><code>&lt;tr&gt;&lt;td&gt;&lt;a href="http://abc.com"&gt;zzz&lt;/a&gt;&lt;/td&gt;&lt;td&gt;11&lt;/td&gt;&lt;td&gt;22&lt;/td&gt;&lt;td&gt;33&lt;/td&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;&lt;a href="http://cba.com"&gt;aaa&lt;/a&gt;&lt;/td&gt;&lt;td&gt;11&lt;/td&gt;&lt;td&gt;22&lt;/td&gt;&lt;td&gt;33&lt;/td&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;&lt;a href="http://bbb.com"&gt;ccc&lt;/a&gt;&lt;/td&gt;&lt;td&gt;11&lt;/td&gt;&lt;td&gt;22&lt;/td&gt;&lt;td&gt;33&lt;/td&gt;&lt;/tr&gt;
  </code></pre>
  
  <p>It will order</p>
  
  <pre><code>zzz
  ccc
  aaa
  </code></pre>
  
  <p>instead of alphabetical. Is this meant to be the case? Is there a fix anyone can suggest?</p>
  
  <p>Thanks</p>