<html>
<head>
<meta charset="UTF-8">
<title>环境搭建</title>
</head>
<script type="text/javascript" src="../js/jquery.min.js"></script>
<style type="text/css">
#info{
width:500px;
height:500px;
background-color:red;
display:none;
}
</style>
<script type="text/javascript">
$(function(){
$("#btn").click(function(){
$("#info").show(2000);
});
});
</script>
<body>
<input type="button" value="测试" id="btn">
<div id="info"></div>
</body>
</html>