将纯数字转成货币单位（万，亿，兆）

1. 可二次开发成支持数字输出或者中文输出
2. 默认从万开始，因为1000可以轻松辨别，当然也可以二次扩展
3. 源代码

var convertCurrency=function(){
var cnNums = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
        var cnIntRadice = new Array('', '0', '00', '000');
        var cnIntUnits = new Array('', '万', '亿', '兆');
        var cnDecUnits = new Array('角', '分', '毫', '厘');
        var cnIntLast = '元';
        var maxNum = 999999999999999.9999;
        var integerNum;
        var decimalNum;
        var chineseStr = '';
        var parts;
        if (money == '') { return ''; }
        money = parseFloat(money);
        if (money >= maxNum) {
            //超出最大处理数字
            return '';
        }
        if (money == 0) {
            chineseStr = cnNums[0] + cnIntLast;
            return chineseStr;
        }
        money = money.toString();
        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) {
            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];
                    }
                    //归零
                    zeroCount = 0;
                    chineseStr += cnNums[parseInt(n)] + cnIntRadice[m];
                }
                if (m == 0 && zeroCount < 4) {
                    chineseStr += cnIntUnits[q];
                }
            }
            chineseStr += cnIntLast;
        }
        if (decimalNum != '') {
            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;
        } else if (decimalNum == '') {
            chineseStr;
        }
        return chineseStr;
}

　　就是这样啦。