jquery-添加/删除cookie

       //删除cookie  
      function DelCookie(name) {
            var exp = new Date();
            exp.setTime(exp.getTime() - 1);
            document.cookie = name + "=; expires=" + exp.toGMTString();
        }
        //添加cookie
        var addCookie = function (objName, objValue, objDays) {
            var str = objName + "=" + escape(objValue);
            if (objDays > 0) {//为0时不设定过期时间，浏览器关闭时cookie自动消失
                var date = new Date();
                var ms = objDays * 3600 * 1000 * 24;
                date.setTime(date.getTime() + ms);
                str += "; expires=" + date.toGMTString();
            }
            document.cookie = str;
        };