title: undefined error in jquery
body: <p>I get here as x undefined error. In my <code>tr</code> tag I have used this code (in <code>a.php</code>):</p>
  
  <pre><code>echo "&lt;tr data-x'some php value'&gt;"; 
  </code></pre>
  
  <p>In <code>b.php</code> I'm using code like this: </p>
  
  <pre><code>window.location = 'c.php?x=' + $(this).data('x');
  </code></pre>