JavaScript实现广告弹窗效果

大家都见过某度中的恶意广告，你关闭了又出来了！为何，JS来告诉你

HTML

<body><h3 class="whiteColor">无法关闭的弹框，打不死的小强！</h3><div id="middleBox"><a href="javascript:;" class="close_btn" id="closeBtn"><img src="images/close_icon.png" alt="" class="will_close"></a><ul class="parent_btn"><li><a href="/" class="btn_tel"><img src="images/icon_tel.gif" alt=""><span>拨打电话</span></a></li><li><a href="/" class="btn_chat"><img src="images/icon_chat.gif" alt=""><span>快速留言</span></a></li></ul></div></body>

CSS

 *{margin: 0;padding: 0;list-style: none;outline: none;box-sizing: border-box;text-decoration: none;}a { -webkit-touch-callout: none; text-decoration: none }:focus { outline: 0 }body{font-family: Helvetica, STHeiTi, "Microsoft YaHei", sans-serif;color: #595757;background-color: #fff;outline: 0;overflow-x: hidden;-webkit-tap-highlight-color:rgba（0,0,0,0）;}img{border: none;}.whiteColor{color: #fff;text-align: center;}.flex_parent{display: -webkit-box;display: -moz-box;display: -ms-flexbox;display: -webkit-flex;display: flex;}.flex_child{-webkit-box-flex: 1;-moz-box-flex: 1;-webkit-flex: 1;-ms-flex: 1;flex: 1;}/*middle_box*/body{position: relative;background-color: #272822;}#middleBox{width: 260px;height: 248px;margin: 0 auto;background-image: url（../images/irfa_dog.jpg）;background-repeat: no-repeat;background-size: 100% 100%;border-radius: 10px;/*水平垂直居中*/position: fixed;left: 50%;top: 50%;margin-top: -124px;-webkit-transform: translateX（-50%）;-moz-transform: translateX（-50%）;-o-transform: translateX（-50%）;-ms-transform: translateX（-50%）;transform: translateX（-50%）;z-index: 100;}.close_btn{display: block;overflow: hidden;position: absolute;top: -10px;right: -10px;}.will_close{width:32px;}#middleBox a{overflow: hidden;}#middleBox a img,#middleBox a span,#middleBox ul li{float: left;}#middleBox a span{font-size: 16px;color: #fff;}#middleBox ul{overflow: hidden;}#middleBox ul li{width: 130px;}#middleBox ul li a{line-height: 50px;display: block;padding-left: 5px;}#middleBox ul li a img{width:30px;margin-right: 2px;margin-top: 8px;margin-left: 5px;}.btn_tel{background-color: #F92665;border-bottom-left-radius: 10px;}.btn_chat{background-color: #1EA362;border-bottom-right-radius: 10px;}.parent_btn{position: absolute;left: 0;bottom: 0;}

/** * Created by Administrator on 2016/7/19. */var adv={div:null,timer:null,btn:null,init:function（）{this.btn=document.getElementById（"closeBtn"）;this.div=document.getElementById（"middleBox"）;this.btn.onclick=this.displayNone;},displayBlock:function（）{adv.div.style.display="block";},displayNone:function（）{adv.div.style.display="none";timer=setTimeout（function（）{adv.displayBlock（）;},3000）;}};window.onload=function（）{adv.init（）;};

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