.打开页面自动弹出 当关闭弹框的时候 设置cookie生存时间 再次刷新页面判断cookie是否失效
<html> <head> <meta charset="utf-8" /> <title>LIGHTBOX EXAMPLE</title> <style> .black_overlay{ display: none; position: absolute; top: 0%; left: 0%; width: 100%; height: 100%; background-color: black; z-index:1001; -moz-opacity: 0.6; opacity:.60; filter: alpha(opacity=60); } .white_content { display: none; position: absolute; top: 25%; left: 25%; width: 50%; height: 50%; /*padding: 16px;*/ /*border: 16px solid orange;*/border: 1px solid grey; background-color: white; z-index:1002; /*overflow: auto; */} </style> <script type="text/javascript" src="js/jquery-1.10.2.min.js"></script> <script> $( document).ready(function(){ //判断cookie是否存在 if(document.cookie.length <=0){ one(); }else{ return ‘‘; } }); function one(){ document.getElementById(‘light‘).style.display=‘block‘; document.getElementById(‘fade‘).style.display=‘block‘ } function two(){ document.getElementById(‘light‘).style.display=‘none‘; document.getElementById(‘fade‘).style.display=‘none‘ //关闭弹框是设置cookie setCookie(‘opop‘,‘lailailai‘,1800) } //设置cookie function setCookie(cname, cvalue, exdays) { var d = new Date(); d.setTime(d.getTime() + (exdays*24*60*60*1000)); var expires = "expires="+d.toUTCString(); document.cookie = cname + "=" + cvalue + "; " + expires; } //获取cookie function getCookie(cname) { var name = cname + "="; var ca = document.cookie.split(‘;‘); for(var i=0; i<ca.length; i++) { var c = ca[i]; while (c.charAt(0)==‘ ‘) c = c.substring(1); if (c.indexOf(name) != -1) return c.substring(name.length, c.length); } return ""; } </script> </script> </head> <body > <p> <a href="javascript:showBg();" onclick="one()">点击这里打开窗口</a> </p> <div id="light" class="white_content"> <img src="http://imageavatar.xiangsibang.com/gfs.php?img=9cdbc343a8846bba79b55a7c523f9b4f&w=800" style="width:100%;height:100%;"> <a href="javascript:void(0)" onclick="two()" style=" color:red;margin-top: -50%; position: absolute;float: right;/* margin-right: -34%; */margin-left: 99%;">X</a> </div> <div id="fade" class="black_overlay" > </div> </body> </html>