JS 将数字转换成金额

function changePrice2money(s)
        {
            if (/[^0-9\.]/.test(s)) return "invalid value";
            s = s.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");
            return "¥" + s.replace(/^\./, "0.")
        }