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]]
}
}
});
}