<html>
<head>
<script type="text/javascript" src="../jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".btn1").click(function(){
$("p").animate({borderBottomWidth:"10px"});
});
$(".btn2").click(function(){
$("p").animate({borderBottomWidth:"1px"});
});
});
</script>
</head>
<body>
<p style="border:1px solid black">This is a paragraph.</p>
<button class="btn1">Animate</button>
<button class="btn2">Reset</button>
</body>
</html>