Har ændret lidt i koden og tilføjet nogle kommentarer i javascript-delen.
<html>
<head>
<title>News Scroller</title>
<script type="text/javascript" src="
http://code.jquery.com/jquery-latest.pack.js"></script><style type="text/css">
#scrollup {
  position: relative;
  overflow: hidden;
  border: 1px solid #000;
  height: 195px;
  width: 195px
}
.headline {
  position: absolute;
  top: 205px;
  left: 5px;
  height: 195px;
  width:190px;
  color:#000000;
}
.headline span.date{
  color:#0000ff;
  display:block;
}
</style>
<script type="text/javascript">
var headline_count;
var headline_interval;
var old_headline = 0;
var current_headline = 0;
$(document).ready(function(){
  headline_count = $("div.headline").size();
  $("div.headline:eq("+current_headline+")").css('top', '5px');
  headline_interval = setInterval(headline_rotate,5000);// Delay (5 sek)
  $('#scrollup').hover(function() {
    clearInterval(headline_interval);
  }, function() {
    headline_interval = setInterval(headline_rotate,5000);// Delay (5 sek)
    headline_rotate();
  });
});
function headline_rotate() {
  current_headline = (old_headline + 1) % headline_count;
  $("div.headline:eq(" + old_headline + ")")
    .animate({top: -200},2000, function() { // De 2000 angiver hvor hurtigt teksten skal rulle
      $(this).css('top', '205px');
    });
  $("div.headline:eq(" + current_headline + ")")
    .animate({top: 5},2000); // De 2000 angiver hvor hurtigt teksten skal rulle
  old_headline = current_headline;
}
</script>
</head>
<body>
<div id="scrollup">
  <div class="headline">
    <span class="date">18. november 2010</span>
    Nyhed 1
  </div>  
  <div class="headline">
    <span class="date">19. november 2010</span>
    Nyhed 2
  </div>    
  <div class="headline">
    <span class="date">21. november 2010</span>
    Nyhed 3
  </div>    
  <div class="headline">
    <span class="date">29. november 2010</span>
    Nyhed 4
  </div>    
</div>
</body>
</html>