AES encrypt

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js"></script>
function AESencrypt(str,KEY,IV) {
    key = CryptoJS.enc.Utf8.parse(KEY);
    var iv= CryptoJS.enc.Utf8.parse(IV);
    var encrypted = CryptoJS.AES.encrypt(str, key, {iv:iv,  mode: CryptoJS.mode.CBC });
    return encrypted.toString();
}
function AESdecrypt(str,KEY,IV) {
    var key = CryptoJS.enc.Utf8.parse(KEY);
    var iv=    CryptoJS.enc.Utf8.parse(IV);
    var decrypted = CryptoJS.AES.decrypt(str,key,{iv:iv, mode: CryptoJS.mode.CBC});
    return decrypted.toString(CryptoJS.enc.Utf8);
}