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\");
}