title: Display div content only once in hour
body: <p>Is possible to show div in header of page to visitor only once in hour?</p>
  
  <p>I want to show a bar which shows to a visitor whether we're open or closed. The 'visitor A' should see it at every first page he loads and on the next page not. In 30 minutes it should be shown to him again.</p>
  
  <p>I'm running jquery 1.10.2 at my website.</p>
  
  <p>Thank you for your ideas</p>