How To Navigate through Enter key

[Navas km]

<script type="text/javascript">
        $(document).ready(function () {

            var inputs = $(':input,select').keypress(function (e) {
                if (e.which == 13) {
                    e.preventDefault();
                    var nextInput = inputs.get(inputs.index(this) + 1);
                    if (nextInput) {
                     nextInput.focus();
                     

                    }

                }
            });

        });
 </script>

// this js shows an error when it focus on dropdown box//