JS實現日期格式化

Date.prototype.format = function(format) {
    var o = {
    "M+" : this.getMonth() + 1, //month 
    "d+" : this.getDate(), //day 
    "h+" : this.getHours(), //hour 
    "m+" : this.getMinutes(), //minute 
    "s+" : this.getSeconds(), //second 
    "q+" : Math.floor((this.getMonth() + 3) / 3), //quarter 
    "S" : this.getMilliseconds()
    //millisecond 
    }
    if (/(y+)/.test(format)) {
        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    }


for ( var k in o) {
    if (new RegExp("(" + k + ")").test(format)) {
    format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
    }
}
return format;

}
//調用過程
function operation(value) {
    var date = new Date(value);// 或者直接new Date();
    return date.format("yyyy-MM-dd hh:mm:ss");
}</pre>