title: jQuery: how to retrieve element by concatenated ID?
body: <p>I am dynamically creating and generating their id's to be something like <code>hidden1234</code>.</p>
  
  <p>In the below Javascript code, <code>var hid</code> is retrieved properly by <code>document.getElementById</code>. But the jQuery line below has a syntax error. How can I retrieve this element by Id using jQuery?</p>
  
  <pre><code>var hid = document.getElementById('hidden'+id);
  var hidden = $("#'hidden'+id");
  </code></pre>