JS实现日期格式化

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;
}

//调用过程
function operation(value) {
    var date = new Date(value);// 或者直接new Date();
    return date.format("yyyy-MM-dd hh:mm:ss");
}