Javascript 數值轉換成金錢格式

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.")
                    }