The href property sets or returns the URL of the linked resource.
linkObject.href=URL
The following example changes style sheet:
<html>
<head>
<link rel="stylesheet" type="text/css"
id="style1" href="try_dom_link.css" />
<script type="text/javascript">
function changeStyle()
{
document.getElementById("style1").href="try_dom_link2.css"
}
</script>
</head>
<body>
<form>
<input type="button" id="button1" onclick="changeStyle()"
value="Change style sheet" />
</form>
</body>
</html>