localStorage

 1 <script>
 2     $(document).ready(function(){
 3         var poppy = localStorage.getItem(‘myPopup‘); // 读取localStorage
 4         if(!poppy){    
 5             function PopUp(){
 6                 PopUp(); //不存在则执行
 7             }
 8             setTimeout(function(){
 9                 PopUp();
10             },1000);
11             localStorage.setItem(‘name‘,‘value‘); // 设置localStorage
12         }
13     })
14     //   存在则自然不会执行任何动作       
15 </script>