JS 日期格式化显示

Date.prototype.Format = function (fmt) {var o = {"M+": this.getMonth() + 1, //月份"d+": this.getDate(), //日"H+": this.getHours(), //小时"m+": this.getMinutes(), //分"s+": this.getSeconds(), //秒"q+": Math.floor((this.getMonth() + 3) / 3), //季度"S": this.getMilliseconds() //毫秒};if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));for (var k in o)if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));return fmt;
}//使用如下:
var now = new Date();console.log(now.Format('yyyy-MM-dd HH:mm:ss.S'));