<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<style>
ul{
list-style: none;
100px;
height:72px;
background: #ccc;
overflow:hidden;
}
li{
height:24px;
}
</style>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
</ul>
<script src="js/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(function(){
setInterval(function(){
var newLi = $('ul').children().first();
$('ul').append(newLi);
},1500);
})
</script>
</body>
</html>