title: How to center div in the page? (Height & Width)?
body: <p>silly question, but I can't find answer on it as all answers assume centering div in terms of width.</p>
  
  <p>What I need is to center div in means of height and width so in a very very center of the page.</p>
  
  <p>I tried this, but it just centers div in means of page width no height.</p>
  
  <pre><code>#myDiv {
     width: 500px;
     height: 500px;
     margin: auto;
  }
  </code></pre>
  
  <p>So how can I get it in the VERY center of the page? )))</p>