js,格式化long类型日期封装

/**
* 扩展date函数
* author:c3gen
*/

Date.prototype.format = function(format) {
var o = {
"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+)/.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;
}

/**
date 为long类型
pattern 为格式化参数
*/
function getFormatDate(date, pattern) {
if (date == undefined) {
date = new Date();
}
if (pattern == undefined) {
pattern = "yyyy-MM-dd hh:mm:ss";
}
return date.format(pattern);
}

$(function() {
var s = new Date(1388776825);
alert(s);
alert(getFormatDate(s));
})