<html lang="en">
<head>
<meta charset="utf-8">
<title>.show() 演示</title>
<link rel="stylesheet" href="https://libs.baidu.com/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://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script src="https://libs.baidu.com/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>