js读写cookie值

最新推荐文章于 2022-06-01 00:08:00 发布

原创最新推荐文章于 2022-06-01 00:08:00 发布 · 734 阅读

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//获取指定名称的cookie值
   function getCookie(name) {
   var result = null;
   var myCookie = document.cookie + ";";
   var searchName = name + "=";
   var startOfCookie = myCookie.indexOf(searchName);
   var endOfCookie;
   if (startOfCookie != -1) {
   startOfCookie += searchName.length;
   endOfCookie = myCookie.indexOf(";", startOfCookie);
   result = unescape(myCookie.substring(startOfCookie, endOfCookie));
   }
   return result;
   }
   //给指定cookie名称赋值
   function setCookie(Name, cookievalue) {
   var newcookie = Name + "=" + escape(cookievalue);
   document.cookie = newcookie;
   }
   //删除指定名称的cookie
   function clearCookie(name) {
   var ThreeDays = 3 * 24 * 60 * 60 * 1000;
   var expDate = new Date();
   expDate.setTime(expDate.getTime() - ThreeDays);
   document.cookie = name + "=;expires=" + expDate.toGMTString();

}

   //页面关闭自动清除cookie值
   function window.onbeforeunload() {
   clearCookie("strQues");
   }