js 时间日期函数

忘记从哪里拷贝过来的了,侵删

Date.prototype.format = function (format) {
            var date = {
                "M+": this.getMonth() + 1,
                "d+": this.getDate(),
                "h+": this.getHours(),
                "m+": this.getMinutes(),
                "s+": this.getSeconds(),
                "q+": Math.floor((this.getMonth() + 3) / 3),
                "S+": this.getMilliseconds()
            };
             
            if (/(y+)/i.test(format)) {
                format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));
            }
         
            for (var k in date) {
                if (new RegExp("(" + k + ")").test(format)) {
                  format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
                }
            }
             
            return format;
        }

使用时 new Date(xx).format("yyyy-MM-dd hh:mm:ss")即可