title: How to get data from jQuery script (web.py)?
body: <p>I can't find any tutorial for jQuery + web.py.
  So I've got basic question on POST method.</p>
  
  <p>I've got jQuery script:</p>
  
  <pre><code>&lt;script&gt;
       jQuery('#continue').click(function() {
           var command = jQuery('#continue').attr('value');
           jQuery.ajax({
                type: "POST",
                data: {signal : command},
           });
       });
  &lt;/script&gt;
  </code></pre>
  
  <p>A simple form:</p>
  
  <pre><code>&lt;form&gt;
      &lt;button type="submit"&gt;Cancel&lt;/button&gt;
      &lt;button type="submit" id="continue" value="next"&gt;Continue&lt;/button&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>and python script:</p>
  
  <pre><code>def POST (self):
          s = signal
          print s
          return
  </code></pre>
  
  <p>I expect to see string "next" in console. But it doesn't happen. </p>
  
  <p>I have a strong feeling that selectors somehow do not work. Any way to check it?</p>