<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hello jQuery</title>
<style type="text/css">
#demo { width:100px; height:100px; font-size:12px; background:#f00; }
</style>
<script type="text/javascript" src="js/jquery-1.5.1.min.js"></script>
<script type="text/javascript">
$(function(){
$("#demo").animate({"width":"400px","height":"200px","font-size":"70px"},1000);
});
</script>
</head>
<body>
<div id="demo">wow! jQuery.</div>
</body>
</html>