//設定cookie

set_Cookie('Id','1',10);

function set_Cookie(name, value, liveMinutes) {  
  if (liveMinutes == undefined || liveMinutes == null) {
    liveMinutes = 60 * 2;
  }
  if (typeof (liveMinutes) != 'number') {
    liveMinutes = 60 * 2;//預設120分鐘
  }
  var minutes = liveMinutes * 60 * 1000;
  var exp = new Date();
  exp.setTime(exp.getTime() + minutes + 8 * 3600 * 1000);
  //path=/表示全站有效，而不是當前頁
  document.cookie = name + "=" + value + ";path=/;expires=" + exp.toUTCString();
}

//獲取cookie

get_cookie('id');

function get_cookie(Name) {
   var search = Name + "="//查詢檢索的值
   var returnvalue = "";//返回值
   if (document.cookie.length > 0) {
     sd = document.cookie.indexOf(search);
     if (sd!= -1) {
        sd += search.length;
        end = document.cookie.indexOf(";", sd);
        if (end == -1)
         end = document.cookie.length;
         //unescape() 函式可對通過 escape() 編碼的字串進行解碼。
        returnvalue=unescape(document.cookie.substring(sd, end))
      }
   } 
   return returnvalue;
}