js阿拉伯数字转中文大写

function DX(n) {
if (!/^(0|[1-9]\d*)(\.\d+)?$/.test(n))
return "数据非法";
var unit = "千百拾亿千百拾万千百拾元角分", str = "";
n += "00";
var p = n.indexOf('.');
if (p >= 0)
n = n.substring(0, p) + n.substr(p+1, 2);
unit = unit.substr(unit.length - n.length);
for (var i=0; i < n.length; i++)
str += '零壹贰叁肆伍陆柒捌玖'.charAt(n.charAt(i)) + unit.charAt(i);
return str.replace(/零(千|百|拾|角)/g, "零").replace(/(零)+/g, "零").replace(/零(万|亿|元)/g, "$1").replace(/(亿)万|壹(拾)/g, "$1$2").replace(/^元零?|零分/g, "").replace(/元$/g, "元整");
}

文章来自：http://www.cnblogs.com/zsanhong/p/3509464.html