<select id="adresler" name="adresler">
            <option value = "www.google.com">Google</option>
            <option value = "www.mynet.com">Mynet</option>
        </select>
            <script>
            $(document).ready(function() {
                $("#adresler").on("change",function() {
                    var s = $("#<dresler").val();
                    window.location.href = s;
                });
            });
            </script>