title: issue with retrieving hiddenfield value in javascript
body: <p>I am trying to retrieve the value of <code>Hiddenfiedl</code>. This is generated by <code>.aspx</code> so I have to do some asp related stuff</p>
  
  <pre><code>     var FolderName = $('#&lt;%= HiddenFieldArticleId.ClientID %&gt;').val();
  </code></pre>
  
  <p>but it shows <code>undefined</code>. Not sure why.</p>
  
  <p>this is the html</p>
  
  <pre><code>   &lt;input type="hidden" name="ctl00$ContentPlaceHolder1$HiddenFieldArticleId" id="ctl00_ContentPlaceHolder1_HiddenFieldArticleId" value="60380a7e-3048-4b4b-a2a0-86126b1be0cd"&gt;
  </code></pre>