(function () {
            Date.prototype.format = function (format) {
                var weekDay = ["星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];
                var o = {
                    "M+": this.getMonth() + 1, //month
                    "d+": this.getDate(), //day
                    "h+": this.getHours(), //hour
                    "m+": this.getMinutes(), //minute
                    "s+": this.getSeconds(), //second
                    "q+": Math.floor((this.getMonth() + 3) / 3), //quarter
                    "S": this.getMilliseconds(), //millisecond
                    "w": weekDay[this.getDay()] //week
                }

                if (/(y+)/.test(format)) {
                    format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
                }

                for (var k in o) {
                    if (new RegExp("(" + k + ")").test(format)) {
                        format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
                    }
                }
                return format;
            };
        })();