title: Load Javascript only once per user / browser session
body: <p>I have this modal that pop up on page load...</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  
  jQuery(document).ready(function($) {  
    setTimeout(function() {
      $.UIkit.modal('#newsletter-20').show();
    }, 3000);
  });
  
  &lt;/script&gt;
  </code></pre>
  
  <p>It all work's fine but I need it to appear only once per user / browser session...Since I'm a noob I have no idea how to acheive that even after looking into this information > <a href="http://www.w3schools.com/js/js_cookies.asp" rel="nofollow">http://www.w3schools.com/js/js_cookies.asp</a></p>
  
  <p>Tks for the help!</p>