JS将人民币小写金额转换为大写

    /** 数字金额大写转换(可以处理整数,小数,负数) */
    function smalltoBIG(n)
    {
        var fraction = ['角', '分'];
        var digit = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
        var unit = [ ['元', '万', '亿'], ['', '拾', '佰', '仟']  ];
        var head = n <? '欠': '';
        n = Math.abs(n);    

        var s = '';    

        for (var i = 0; i < fraction.length; i++)
        {
            s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
        }
        s = s || '整';
        n = Math.floor(n);    

        for (var i = 0; i < unit[0].length && n > 0; i++)
        {
            var p = '';
            for (var j = 0; j < unit[1].length && n > 0; j++)
            {
                p = digit[n % 10] + unit[1][j] + p;
                n = Math.floor(n / 10);
            }
            s = p.replace(/(零.)*零$/, '').replace(/^$/, '零')  + unit[0][i] + s;
        }
        return head + s.replace(/(零.)*零元/, '元').replace(/(零.)+/g, '零').replace(/^整$/, '零元整');
    }