js比较两个时间点

   var compareDate = function () {//比较两个时间点

                        //获取当前时间
                        var t = new Date();
                        var y = t.getFullYear();
                        var m = t.getMonth();
                        var d = t.getDate();
                        var h = t.getHours();
                        var mm = t.getMinutes();
                        var s = t.getSeconds();
                        var endTime = new Date(y, 8, 22, 23, 59, 59);
                        var nowTime = new Date(y, m, d, h, mm, s)

                        return (endTime > nowTime);
                    }
                    alert(compareDate());