<html>
<head>
<script>
function changeTabIndex()
{
document.getElementById('1').tabIndex="3";
document.getElementById('2').tabIndex="2";
document.getElementById('3').tabIndex="1";
}
</script>
</head>
<body>
<p><a id="1" href="/">1</a></p>
<p><a id="2" href="/">2</a></p>
<p><a id="3" href="/">3</a></p>
<input type="button" onclick="changeTabIndex()" value="Change TabIndex">
<p>Try navigating the links by using the "Tab" button on you keyboard before and after pushing the "Change TabIndex" button.</p>
</body>
</html>