datapicker doesn't work! what's the problem?
I copy the code from the web,why it can not show the calendar?
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Draggable - Default functionality</title>
<link rel="stylesheet" href="jquery-ui-1.10.4.custom/css/ui-lightness/jquery-ui-1.10.4.custom.css">
<script src="jquery-ui-1.10.4.custom/js/jquery-1.10.2.js"></script>
<script src="jquery-ui-1.10.4.custom/js/jquery-ui-1.10.4.custom.js"></script>
<link rel="stylesheet" href="jquery-ui-1.10.4.custom/development-bundle/demos/demos.css">
<script>
$(function() {
$( "#datepicker" ).datepicker();
});
</script>
</head>
<body>
<p>Date: <input type="text" id="datepicker"></p>
</body>
</html>