Untitled

<!DOCTYPE html>
<html>

<script type="text/javascript">

    var liste = ["Hallo", "wie", "gehts"];
    var currentItem = 0;

    function next()
    {
        currentItem++;
        return liste[currentItem%liste.length];
    }

    function previous()
    {
        currentItem = (currentItem + liste.length - 1) % liste.length;
        return liste[currentItem];
    }

    document.write(next());
    document.write(previous());


</script>

<head>
    <title></title>
</head>
<body>

</body>
</html>