Enter 로 form submit() 하기

function enableEnter(frm) {
    frm.addEventListener("keydown", evt => {
        if (evt.code && evt.code === "Enter") {
            frm.submit();
        }
        if (evt.key && evt.key === "Enter") {
            frm.submit();
        }
    });
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script>
    $(document).ready(function() {
        enableEnter(document.frm);
    });
</script>

<form id="frm" name="frm" method="post">
<table>
    <tr>
        <td><label for="userLoginId">아이디</label></td>
        <td><input id="userLoginId" type="text" name="userLoginId"></td>
    </tr>
</table>
</form>