转自http://hi.baidu.com/279713119/blog/item/7b6e295baad403262934f029.html

/*
?* formatMoney(s,type)
?* 功能：金额按千位逗号分割
?* 参数：s，需要格式化的金额数值.
?* 参数：type,判断格式化后的金额是否需要小数位.
?* 返回：返回格式化后的数值字符串.
?*/
function formatMoney(s, type) {
??? if (/[^0-9\.]/.test(s)) return "0";
??? if (s == null || s == "") return "0";
??? s = s.toString().replace(/^(\d*)$/, "$1.");
??? s = (s + "00").replace(/(\d*\.\d\d)\d*/, "$1");
??? s = s.replace(".", ",");
??? var re = /(\d)(\d{3},)/;
??? while (re.test(s))
??????? s = s.replace(re, "$1,$2");
??? s = s.replace(/,(\d\d)$/, ".$1");
??? if (type == 0) {// 不带小数位(默认是有小数位)
??????? var a = s.split(".");
??????? if (a[1] == "00") {
??????????? s = a[0];
??????? }
??? }
??? return s;
}
/*
?* 通用DateAdd(interval,number,date)
?* 功能:实现javascript的日期相加功能.
?* 参数:interval,字符串表达式，表示要添加的时间间隔.
?* 参数:number,数值表达式，表示要添加的时间间隔的个数.
?* 参数:date,时间对象.
?* 返回:新的时间对象.
?* var now = new Date();
?* var newDate = DateAdd("day",5,now);
?* author:devinhua(从○开始)
?* update:2010-5-5 20:35
?*/
function DateAdd(interval, number, date) {
??? if (date == null)
??????? return "";
??? switch (interval) {
??????? case "day":
??????????? date = new Date(date);
??????????? date = date.valueOf();
??????????? date += number * 24 * 60 * 60 * 1000;
??????????? date = new Date(date);
??????????? return date;
??????????? break;
??????? default:
??????????? return "";
??????????? break;
??? }
}