title: Cannot make PDF from Html div by jsPDF
body: <p>I have this js code : </p>
  
  <pre><code>var doc = new jsPDF();
  
  $('#pdf_new').click(function(){
      var html=$(".wrap_all").html();
      doc.fromHTML(html,200,200, {
          'width': 500,
      });
      doc.save("Test.pdf");
  });
  </code></pre>
  
  <p>In html I have code like this : </p>
  
  <pre><code>&lt;div class = 'wrap_all'&gt;
      &lt;div id = 'wrap_odd'&gt; &lt;div id = ''&gt;....&lt;/div&gt; &lt;/div&gt;
  
      &lt;div id = 'wrap_even'&gt; &lt;div id = ''&gt;....&lt;/div&gt; &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Nothing works ... Console return to me:</p>
  
  <blockquote>
    <p>Cannot read property <code>#wrap_odd</code> of undefined"</p>
  </blockquote>
  
  <p>(P.S sorry for my English)</p>