<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css"
rel="stylesheet" type="text/css"/>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<script>
$(document).ready(function() {
$("#datepicker").datepicker({ dateFormat: 'yyyy-mm-dd' });
});
</script>
另外jQuery UI的主題css列表
http://encosia.com/2009/10/11/do-you-know-about-this-undocumented-google-cdn-feature/