public string EncryptString(string input, string key)
            {

                RijndaelManaged aesMgr = new RijndaelManaged();
                string result = String.Empty;
                var encryptKey = new Rfc2898DeriveBytes(key, mSalt);
                aesMgr.Key = encryptKey.GetBytes(aesMgr.KeySize/8);
                ICryptoTransform encryptor = aesMgr.CreateEncryptor(aesMgr.Key, aesMgr.IV);

                using (MemoryStream sEncrypt = new MemoryStream())
                {
                    sEncrypt.Write(BitConverter.GetBytes(aesMgr.IV.Length), 0, sizeof(int));
                    sEncrypt.Write(aesMgr.IV, 0, aesMgr.IV.Length);
                    using (var crypto = new CryptoStream(sEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (var sw = new StreamWriter(crypto))
                        {
                            sw.Write(input);
                        }
                        result = Convert.ToBase64String(sEncrypt.ToArray());
                    }
                }
                return result;
            }

function encrypttxt (msg, pass, mSalt) {
    var salt = CryptoJS.enc.Latin1.parse(mSalt);

    var key = CryptoJS.PBKDF2(pass, salt, {
        keySize: 256/32,
        iterations: 1000
      });

    var iv = CryptoJS.lib.WordArray.random(16);

    var encrypted = CryptoJS.AES.encrypt(msg, key, {
      iv: iv,
      padding: CryptoJS.pad.Pkcs7,
      mode: CryptoJS.mode.CBC

    });
    var transitmessage = salt.toString()+ iv.toString() + encrypted.toString();
    return transitmessage.toString(CryptoJS.enc.Base64);
  }