javascript数字小写转大写金额函数

<script>
 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");  
 }  
 alert('1526365.56 '+DX(1526365.56));    
</script>