JavaScript将数字转换成大写中文的方法

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]]   }  } });}