title: How to show progress bar with jQuery?
body: <p>Just to tell the user that your request is being processed.</p>
  
  <p><strong>EDIT</strong>:</p>
  
  <p>I've find myself an image.</p>
  
  <p><a href="https://i.stack.imgur.com/UQ73Q.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UQ73Q.gif" alt="alt text"></a><br>
  <sub>(source: <a href="http://maishudi.com/loading.gif" rel="nofollow noreferrer">maishudi.com</a>)</sub>  </p>
  
  <p>How to show it in the center of whole page?</p>