cookie 一次性弹窗

function getCookie(name){
          var strcookie = document.cookie;//获取cookie字符串
          var arrcookie = strcookie.split("; ");//分割
          //遍历匹配
          for ( var i = 0; i < arrcookie.length; i++) {
              var arr = arrcookie[i].split("=");
              if (arr[0] == name){
                  return arr[1];
              }
          }
          return "";
      }
      var cookieval=getCookie('pop');  // 获取  cookie里设置的  pop值

      if(!cookieval){    //判断cookie值
          $(".box").show();
      }else{
          $(".box").hide();
      }

      $(".close").click(function(){    //点击弹窗关闭按钮
          $(".box").hide();   //弹窗关闭
          document.cookie="pop=popval";   //设置cookie值

      })