在html在添加cookie和讀取cookie

1.保存cookie

 var oDate = new Date();
 oDate.setDate(oDate.getDate() + 30);//有效期為30天
 document.cookie = "name=www.wzh.com;expires=" + oDate;

2.讀取cookie

var res = document.cookie.substring(5);
if (res != "www.wzh.com") {
   alert("沒有cookie信息");
}