javascript如何把汉字转化为数字，比如一二三三九一转化成123391

javascript如何把汉字转化为数字，比如一二三三九一转化成123391

function _convert(str)
{
    var arr = ["一","二","三","四","五","六","七","八","九","十"];
    for (var i = 0; i < arr.length; i++) {
        str = str.replace(new RegExp(arr[i], "g"), (i+1));
    }
    return str;
}

// 使用
var str = "一二三三九一";
var result = _convert(str);
result // 123391追问要加零呢追答var arr = ["零","一","二","三","四","五","六","七","八","九","十"];

...
str = str.replace(new RegExp(arr[i], "g"), (i));

成123391成123391成123391