title: show the div even after the page reload
body: <p>On click of a button, I am showing a div by using</p>
  
  <pre><code>document.getElementById('message-box').style.display="block";
  </code></pre>
  
  <p>but when the page is reloaded this div disappears again. I want the div to stay until i explicitly close it with <code>x</code> button. How I can do this?</p>