javascript 格式化数字 千分位加逗号小数点

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;}}