<html>
<head>
<script type="text/javascript" src="../jquery/jquery.js" tppabs="http://www.w3school.com.cn/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#start").click(function(){
$("#box").animate({height:300},"slow");
$("#box").animate({width:300},"slow");
$("#box").animate({height:100},"slow");
$("#box").animate({width:100},"slow");
});
});
</script>
</head>

<body>

<p><a href="#" id="start">Start Animation</a></p>

<div id="box"
style="background:#98bf21;height:100px;width:100px;position:relative">
</div>

</body>
</html>