<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<style>
p, div { margin:5px; padding:5px; }
.border { border: 2px solid red; }
.background { background:yellow; }
</style>
</head>
<body>
<ul>
<li>list item 1</li>
<li>list item 2</li>
<li class="third-item">list item 3</li>
<li>list item 4</li>
<li>list item 5</li>
</ul>
<script>
$("li.third-item").nextAll().andSelf().css("background-color", "red");
</script>
</body>
</html>