title: Dojo hiding and showing div using Attach points
body: <p>I have a loader div defined as say for simplicity</p>
  
  <pre><code>&lt;div dojoAttachpoint="loaderDiv" style="display:none;"&gt;.....&lt;/div&gt;
  </code></pre>
  
  <p>Now when i have a function that is called i want this div to be shown, how do i do that ?</p>