JavaScript将数字转换成大写中文

JavaScript将数字转换成大写中文

function intToChinese ( str ) {
  str = str+'';
  var len = str.length-1;
  var idxs = ['','十','百','千','万','十','百','千','亿','十','百','千','万','十','百','千','亿'];
  var num  = ['零','壹','贰','叁','肆','伍','陆','柒','捌','玖'];

  return str.replace(/([1-9]|0+)/g,function( $, $1, idx, full) {
    var pos = 0;
    if( $1[0] != '0' ){
      pos = len-idx;
      if( idx == 0 && $1[0] == 1 && idxs[len-idx] == '十'){
        return idxs[len-idx]; 
      }
      return num[$1[0]] + idxs[len-idx]; 
    } else {
      var left = len - idx;
      var right = len - idx + $1.length;
      if( Math.floor(right/4) - Math.floor(left/4) > 0 ){
        pos = left - left%4;
      }
      if( pos ){
        return idxs[pos] + num[$1[0]];
      } else if( idx + $1.length >= len ){
        return '';
      }else {
        return num[$1[0]]
      }
    }
  });
    
}