title: Assign Div id to variable jQuery
body: <p>I am trying to assign div id to a variable in jQuery .</p>
  
  <pre><code> var tbdiv = null;
      tbdiv= $('#mydiv');
  </code></pre>
  
  <p>But this is throwing error in my jQuery file as  ' Invalid argument '.</p>
  
  <p>I am trying to do the following code which is in javascript</p>
  
  <pre><code>var tbdiv =document.getElementById('mydiv');
  </code></pre>