JS数字金额转为大写金额

/** 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 < 0? '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');
}