Untitled

<!DOCTYPE html>
  <html lang="en">
    <head>
	  <meta charset="UTF-8">
    </head>
  <body onload="time()">
  </body>
  <footer>
    <script src="jquery-2.2.4.js">
	$(function(){
	function time() {
        var rightNow = new Date();
        var hour = rightNow.getHours();

        switch(true)
        {
          case (hour >= 8 && hour < 12):
	      alert('Good morning!');
       	  break;
	      case (hour >= 12 && hour < 18):
	      alert('Good afternoon!');
	      break;
	      case (hour >= 18 && hour < 24):
	      alert('Good evening!');
	      break;
	      default:
	      alert('You should be sleeping!');
	      break;
        }
      }
	});

    </script>
  </footer>
</html>