js阿拉伯变成中文数字

js代码[转自网络]

function NoToChinese(num) {
  if (!/^\d*(\.\d*)?$/.test(num)) {
    alert('Number is wrong!');
    return 'Number is wrong!';
  }
  var AA = new Array('零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖');
  var BB = new Array('', '拾', '佰', '仟', '万', '亿', '点', '');
  var a = ('' + num).replace(/(^0*)/g, '').split('.'),
  k = 0,
  re = '';
  for (var i = a[0].length - 1; i >= 0; i--) {
    switch (k) {
      case 0:
        re = BB[7] + re;
        break;
      case 4:
        if (!new RegExp('0{4}\\d{' + (a[0].length - i - 1) + '}$').test(a[0]))
        re = BB[4] + re;
        break;
      case 8:
        re = BB[5] + re;
        BB[7] = BB[5];
        k = 0;
        break;
    }
    if (k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0) re = AA[0] + re;
    if (a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k % 4] + re;
    k++;
  }
  if (a.length > 1) //加上小数部分(如果有小数部分) 
  {
    re += BB[6];
    for (var i = 0; i < a[1].length; i++) re += AA[a[1].charAt(i)];
  }
  return re;
}

测试 alert(NoToChinese('213123123'));

贰亿壹仟叁佰壹拾贰万叁仟壹佰贰拾叁