$(selector).show(speed,callback)
- 毫秒 （比如 1500）
- "slow"
- "normal"
- "fast"
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".btn1").click(function(){
$("p").hide();
});
$(".btn2").click(function(){
$("p").show();
});
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<button class="btn1">Hide</button>
<button class="btn2">Show</button>
</body>
</html>