<form method="post" asp-action="Logout" asp-controller="Account" id="logoutForm">
        <ul class="nav navbar-nav navbar-right" id="afmeldenmenu" title="Afmelden" style="padding-left: 10px; padding-right: 20px">
            <li class="nav-item show">
                <a href="javascript:logoff()" class="nav-link" role="button"><span class="k-icon k-i-logout" style="padding-right: 2px"></span></a>
            </li>
        </ul>
</form>