title: How to center a table of the screen (vertically and horizontally)
body: <p>I have these code block:</p>
  
  <pre><code>&lt;table border="1px"&gt;
  &lt;tr&gt;
  &lt;td&gt;
  my content
  &lt;/td&gt;
  &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>I'd like to show my table in the center of the screen (vertically and horizontally).</p>
  
  <p><a href="http://pro-admin.magentocommerce.com/index.php/admin/" rel="nofollow noreferrer">Here is a demo</a>.</p>
  
  <p>How can I do that?</p>