日期格式化

Date.prototype.dateFormat = 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|mm/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' +(this.getMonth() + 1));
　　str = str.replace(/M|m/g, (this.getMonth() + 1));
　　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(/ii/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
　　str = str.replace(/i/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
}