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