报错 is not a function，如何解决

Question

var v = new l();
function l(l, n, t) {
    this.http = l,
    this.masageService = n,
    this.router = t,
    this.privaKey = this.getAesKey(16),
    this.crypto = {
        Encrypt: function(l) {
            var n = p.enc.Utf8.parse("t171420100302rsa")
              , t = p.enc.Utf8.parse("t171420100302rsa")
              , e = p.enc.Utf8.parse(l)
              , a = p.AES.encrypt(e, n, {
                iv: t,
                mode: p.mode.CBC,
                padding: p.pad.Pkcs7
            });
            return p.enc.Base64.stringify(a.ciphertext)
        }
    };
    var e = JSON.parse(this.getUserInfo());
    this.head = {
        customerId: e.head.customerId,
        userCode: e.head.userCode
    }
}

v['prototype']['getAesKey'] = function(l) {
    l = l || 32;
    for (var n = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678", t = n.length, e = "", a = 0; a < l; a++)
        e += n.charAt(Math.floor(Math.random() * t));
    return e
}

上述代码为啥执行后，报错this.getAesKey is not a function，不是很懂JS，该怎么改。

Answer 1

顺序错了，
1、第二行放到最后
2、28行 v 改成 l