// this function doesnt work - the resultant message (which is
//       IV+Ecypted text all as HEX cannot be decrypted.
function encrypt() {
    var key = CryptoJS.enc.Hex.parse('48656c6c6f2c20576f726c6421888888');
    var IVLEN = 16; // Im guessing this is 16 bytes.
    var iv= CryptoJS.lib.WordArray.random(IVLEN);
    var encrypted;
    var message;

    encrypted = CryptoJS.AES.encrypt("1234", key, { iv: iv, padding: CryptoJS.pad.NoPadding,  mode: CryptoJS.mode.CBC });

    message = CryptoJS.enc.Hex.stringify(iv) + CryptoJS.enc.Hex.stringify(encrypted.ciphertext);

    var test = decrypt(message);  // throws a malformed UTF-8 exception

    alert (test); // should alert"1234"

    return message;

}

// this function works perfectly with data generated using HURLANT crypto libs.
function decrypt(data) {
    var key = CryptoJS.enc.Hex.parse('48656c6c6f2c20576f726c6421888888');
    var ivHexStr, iv;
    var encMessageHexStr;
    var IVLEN = 32;  // This is 16 bytes, as one byte is 2 Hex chars.
    var encrypted = {};
    var decrypted;
    var result;

    ivHexStr = data.substring(0,IVLEN);
    encMessageHexStr = data.substring(IVLEN);

    iv = CryptoJS.enc.Hex.parse(ivHexStr);
    encrypted.key        = key;
    encrypted.iv         = iv;
    encrypted.ciphertext = CryptoJS.enc.Hex.parse(encMessageHexStr);

    decrypted = CryptoJS.AES.decrypt(encrypted, key, { iv: iv, padding: CryptoJS.pad.NoPadding, mode: CryptoJS.mode.CBC });

    result = CryptoJS.enc.Utf8.stringify(decrypted);

    return(result);
}; //decrypt()