金额转换

分享几种有关金额的js方法：

1.数字金额转大写

function Chinese(num) {
        if (!/^d*(.d*)?$/.test(num))throw(new Error(-1, "Number is wrong!"));
        var AA = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖");
        var BB = new Array("", "拾", "佰", "仟", "萬", "億", "圆", "");
        var CC = new Array("角", "分", "厘");
        var a = ("" + num).replace(/(^0*)/g, "").split("."), k = 0, re = "";
        for (var i = a[0].length - 1; i >= 0; i--) {
            switch (k) {
                case 0 :
                    re = BB[7] + re;
                    break;
                case 4 :
                    if (!new RegExp("0{4}\d{" + (a[0].length - i - 1) + "}$").test(a[0]))
                        re = BB[4] + re;
                    break;
                case 8 :
                    re = BB[5] + re;
                    BB[7] = BB[5];
                    k = 0;
                    break;
            }
            if (k % 4 == 2 && a[0].charAt(i) == "0" && a[0].charAt(i + 2) != "0") re = AA[0] + re;
            if (a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k % 4] + re;
            k++;
        }
        if (a[0].trim().charAt(0) == "") {       //  a = ["131321"]
            re += AA[0];
        }
        if (a.length > 1) {
            re += BB[6];
            for (var i = 0; i < a[1].length; i++) {
                re += AA[a[1].charAt(i)] + CC[i];
                if (i == 2) break;
            }
            if (a[1].charAt(0) == "0" && a[1].charAt(1) == "0") {
                re += "元整";
            }
        } else {
            re += "元整";
        }
        return re;
    }

比如：

Chinese(123456789));// 壹億贰仟叁佰肆拾伍萬陆仟柒佰捌拾玖元整

2.数字转换为三位节 ,n---->小数点后保留的位数

 function fmoney(s, n) {
        n = n > 0 && n <= 20 ? n : 2;
        s = parseFloat((s + "").replace(/[^d.-]/g, "")).toFixed(n) + "";
        var l = s.split(".")[0].split("").reverse(),
                r = s.split(".")[1];
        t = "";
        for (i = 0; i < l.length; i++) {
            t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");
        }
        return t.split("").reverse().join("") + "." + r;
    }

比如：

fmoney(1234567,2));//12 1,234,567.00
fmoney(1234567,3));//12 1,234,567.000