​x
 
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("div").delegate("button","click",function(){
    $("p").slideToggle();
  });
});
</script>
</head>
<body>
<div style="background-color:red">
<p>这是一个段落。</p>
<button>请点击这里</button>
</div>
​
</body>
</html>
​