服务器环境下：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>弹框</title>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="js/jquery.cookie.js"></script>
<script type="text/javascript">
$(function(){ var $befread = $.cookie(‘befread‘); //alert($befread);判断是否存储过 if($befread == undefined){ $(‘.pop_con‘).show(); /*弹出弹框*/ } $(‘#user_read‘).click(function(){ /*点击后存储cookie，隐藏*/ $.cookie(‘befread‘,‘read‘,{expires:7,path:‘/‘}); $(‘.pop_con‘).hide(); })})</script><style type="text/css">
.pop_con{ display: none;}.pop1{ width: 300px; height: 300px; border: 3px solid #000; background-color: #87CEF5; position: fixed; left: 50%; top: 50%; margin-left: -150px; margin-top: -150px; z-index: 100;}.pop2{ width: 100%; height: 100%; background-color: #000000; opacity: 0.3; filter: alpha(opacity=30); position: fixed; left: 0; top: 0; z-index: 98;}.close{ font-size: 30px; text-decoration: none; color: red; float: right;}</style></head>
<body>
<!--<input type="button" value="点击" class="btn">--><div class="pop_con"> <div class="pop1"> 亲！你点赞过了 <a href="#" class="close" id="off">x</a> <a href="javascript:;" id="user_read">哟不错哦</a> </div> <div class="pop2"></div></div><h1>网站内容</h1></body>
</html>
