在线运行代码 - 菜鸟教程

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>.show() 演示</title>
  <link rel="stylesheet" href="https://apps.bdimg.com/libs/jqueryui/1.10.4/css/jquery-ui.min.css">
  <style>div {
    display: none;
    width: 100px;
    height: 100px;
    background: #ccc;
    border: 1px solid #000;
  }
  </style>
  <script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
  <script src="https://apps.bdimg.com/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
</head>
<body>
 
<button>显示 div</button>
<div></div>
 
<script>
$( "button" ).click(function() {
  $( "div" ).show( "fold", 1000 );
});
</script>
 
</body>
</html>
源代码

动行结果
