link aus formularwerten erstellen

<form action="https://example.com/Search/Apartment/3320/160/" method="GET" name="DAFORM">
    <p><input type="hidden" name="languageCode" value="de_DE"></p>
    <p>
        <label>Anreise</label>
        <input type="text" name="Anreise" placeholder="Anreise">
    </p>
    <p>
        <label>Abreise</label>
        <input type="text" name="Abreise" placeholder="Abreise">
    </p>
    <p>
        <label>Gäste</label><br>
        <input class="w3-radio" type="radio" name="guestcount" value="1">1<br>
        <input class="w3-radio" type="radio" name="guestcount" value="2">2<br>
        <input class="w3-radio" type="radio" name="guestcount" value="3">3<br>
        <input class="w3-radio" type="radio" name="guestcount" value="4">4<br>
    </p>
    <p><button type="submit" name="submit">Senden</button></p>
</form>

window.addEventListener( 'DOMContentLoaded', function() {


    document.querySelector( 'button[name='submit']' ).addEventListener(
            'click'
            , function (e) {
                e.preventDefault();


                _guests = document.querySelector( 'input[name='guestcount']:checked' ).value;
                _arrival = document.querySelector( 'input[name='Anreise']' ).value;
                _departure = document.querySelector( 'input[name='Abreise']' ).value;


                _actionURL = document.querySelector( 'form[name='DAFORM']' ).getAttribute( 'action' )
                    + _arrival + '/' + _departure + '/' + _guests + '?languageCode=' + document.querySelector( 'input[name='languageCode']' ).value;


                window.open( _actionURL, '_blank' );
            }
        );


});