把数字金额转换成中文大写数字的函数(可处理负值)

/*
* 把数字金额转换成中文大写数字的函数(可处理负值)
*/
function changeNumMoneyToChinese(money) {
    var cnNums = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //汉字的数字
    var cnIntRadice = new Array("", "拾", "佰", "仟"); //基本单位
    var cnIntUnits = new Array("", "万", "亿", "兆"); //对应整数部分扩展单位
    var cnDecUnits = new Array("角", "分", "毫", "厘"); //对应小数部分单位
    var cnInteger = "整"; //整数金额时后面跟的字符
    var cnIntLast = "元"; //整型完以后的单位
    var maxNum = 999999999999999.9999; //最大处理的数字
    var IntegerNum; //金额整数部分
    var DecimalNum; //金额小数部分
    var ChineseStr = ""; //输出的中文金额字符串
    var parts; //分离金额后用的数组，预定义    
    var Symbol = "";//正负值标记
    if (money == "") {
        return "";
    }

    money = parseFloat(money);
    if (money >= maxNum) {
        alert('超出最大处理数字');
        return "";
    }
    if (money == 0) {
        ChineseStr = cnNums[0] + cnIntLast + cnInteger;
        return ChineseStr;
    }
    if (money < 0) {
        money = -money;
        Symbol = "负 ";
    }
    money = money.toString(); //转换为字符串
    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) { //获取整型部分转换
        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; //归零
                ChineseStr += cnNums[parseInt(n)] + cnIntRadice[m];
            }
            if (m == 0 && zeroCount < 4) {
                ChineseStr += cnIntUnits[q];
            }
        }
        ChineseStr += cnIntLast;
        //整型部分处理完毕
    }
    if (DecimalNum != '') { //小数部分
        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;
}