js 阿拉伯数字转转汉字

js：(单纯的转汉字，没有个、十、千、万，待我日后完善)

var number = 323413290907;
var N = [
    "零", "一", "二", "三", "四", "五", "六", "七", "八", "九"
];
function convertToChinese(num){
    var str = num.toString();
    var len = num.toString().length;
    var C_Num = [];
    for(var i = 0; i < len; i++){
        C_Num.push(N[str.charAt(i)]);
    }
    return C_Num.join('');
}

var chinese = convertToChinese(number);
alert(chinese);