JS實現 阿拉伯數字金額轉換為中文大寫金額 可以處理負值

//************************* 把數字金額轉換成中文大寫數字的函式(可處理負值) *********************************//
function changeNumMoneyToChinese(money)
{
    var cnNums = new Array("零", "壹", "貳", "叄", "肆", "伍", "陸", "柒", "捌", "玖"); //漢字的數字
    var cnIntRadice = new Array("", "拾", "佰", "仟"); //基本單位
 

    var cnIntUnits = new Array("", "萬", "億", "兆"); //對應整數部分擴充套件單位
    var cnDecUnits = new Array("角", "分", "毫", "釐"); //對應小數部分單位
    var cnInteger = "整"; //整數金額時後面跟的字元
    var cnIntLast = "元"; //整型完以後的單位
    var maxNum = 999999999999999.9999; //最大處理的數字
    var IntegerNum; //金額整數部分
    var DecimalNum; //金額小數部分
    var
 
 ChineseStr = ""; //輸出的中文金額字串
    var parts; //分離金額後用的陣列，預定義    
    var Symbol="";//正負值標記
    if (money == "") {
        return "";
    }

    money = parseFloat(money);
    if (money >= maxNum) {
        alert('超出最大處理數字');
        return "";
    }
    if (money == 0) {
        ChineseStr = cnNums[0] + cnIntLast + cnInteger;
        
 
return ChineseStr;
    }
    if(money<0)
    {
        money=-money;
        Symbol="負 ";        
    }
    money = money.toString(); //轉換為字串
    if (money.indexOf(".") == -1) {
        IntegerNum = money;
        DecimalNum = '';
    } else {
        parts = money.split(".");
        IntegerNum = parts[0];
        DecimalNum = parts[1].substr(0, 4);
    }
    if (parseInt(IntegerNum, 10) > 0) { //獲取整型部分轉換
        var zeroCount = 0;
        var IntLen = IntegerNum.length;
        for (var i = 0; i < IntLen; i++) {
            var n = IntegerNum.substr(i, 1);
            var p = IntLen - i - 1;
            var q = p / 4;
            var m = p % 4;
            if (n == "0") {
                zeroCount++;
            }
            else {
                if (zeroCount > 0) {
                    ChineseStr += cnNums[0];
                }
                zeroCount = 0; //歸零
                ChineseStr += cnNums[parseInt(n)] + cnIntRadice[m];
            }
            if (m == 0 && zeroCount < 4) {
                ChineseStr += cnIntUnits[q];
            }
        }
        ChineseStr += cnIntLast;
        //整型部分處理完畢
    }
    if (DecimalNum != '') { //小數部分
        var decLen = DecimalNum.length;
        for (var i = 0; i < decLen; i++) {
            var n = DecimalNum.substr(i, 1);
            if (n != '0') {
                ChineseStr += cnNums[Number(n)] + cnDecUnits[i];
            }
        }
    }
    if (ChineseStr == '') {
        ChineseStr += cnNums[0] + cnIntLast + cnInteger;
    } else if (DecimalNum == '') {
        ChineseStr += cnInteger;
    }
    ChineseStr = Symbol +ChineseStr;
    
    return ChineseStr;
}