<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>动画菜单</title>
<style>
*{margin:0;padding:0;}
.head{font-size:12px;padding:6px 0 0 10px;}
#login_box{width:300px;height:150px;background:#eee;
border:1px solid #ccc;position:absolute;left:50%;top:50%;margin-left:-150px;margin-top:-75px;display:none;}
#login_box p{height:20px;border-bottom:1px solid #ccc;font-size:12px;padding:6px 0 0 5px;font-weight:bold;}
#close{width:14px;height:14px;position:absolute;right:4px;top:6px;}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-3.2.0.min.js"></script>
<script>
$("#login").click(function(){
$("#login_box").css("display","block");
});
$("#close").click(function(){
$("#login_box").css("display","none");
});
</script>
</head>
<body>
<div class="head">亲，您好！<input type="button" value="登 录" id="login"></div>
<div id="login_box">
<p>用户登录</p><span id="close">X</span>
</div>
</body>
</html>
/*点击按钮后，<div id="login_box">的display没有改变，哪出了问题？*/
阿莫3912736