<script>
            Date.prototype.Format = function (format) {  //在Date对象的原型上申明一个Format方法 
                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
                }
                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;
            };
            //使用方法  
            document.write(new Date("2017-08-07 10:05:21.433").Format("yyyy年MM月dd日 hh:mm:ss"));
        </script>