js日期格式化

Date.prototype.Format = function(
formatStr) {
var str = formatStr;
var Week = [ '日', '一', '二', '三', '四', '五', '六' ];


str = str.replace(/yyyy|YYYY/, this.getFullYear());
str = str.replace(/yy|YY/,
(this.getYear() % 100) > 9 ? (this
.getYear() % 100).toString()
: '0' + (this.getYear() % 100));


str = str.replace(/MM/, this.getMonth() > 9 ? (this
.getMonth()+1).toString() : '0' + (this.getMonth()+1));
str = str.replace(/M/g, this.getMonth());


str = str.replace(/w|W/g, Week[this.getDay()]);


str = str.replace(/dd|DD/, this.getDate() > 9 ? this
.getDate().toString() : '0' + this.getDate());
str = str.replace(/d|D/g, this.getDate());


str = str.replace(/hh|HH/, this.getHours() > 9 ? this
.getHours().toString() : '0' + this.getHours());
str = str.replace(/h|H/g, this.getHours());
str = str.replace(/mm/, this.getMinutes() > 9 ? this
.getMinutes().toString() : '0'
+ this.getMinutes());
str = str.replace(/m/g, this.getMinutes());


str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this
.getSeconds().toString() : '0'
+ this.getSeconds());
str = str.replace(/s|S/g, this.getSeconds());


return str;
}