<script type="text/javascript">
$(document).ready(function(){
  $("button").click(function(){
    $("p").slideToggle();
</script>
</head>
<p>这是一个段落。</p>
<button>切换</button>
</body>

<script type="text/javascript">
$(document).ready(function(){
  $("button").dblclick(function(){
    $("p").slideToggle();
</script>
</head>
<p>这是一个段落。</p>
<button>请双击此处</button>
</body>

var timer = null; 
$('button').live('click', function(event){ 
    timer && clearTimeout(timer); 
    timer = setTimeout(function(){ 
        console.log(event.type); 
    },300); 
}).live('dblclick', function(event){ 
    timer && clearTimeout(timer); 
    console.log(event.type); 
});