if ( is_user_logged_in() ) {
    echo 'Welcome, registered user!';
} else {
    echo 'Welcome, visitor!';
};

jQuery(document).ready(function(){
if ( is_user_logged_in() ) {
    document.getElementById("visitorstatus").innerHTML = "LOG OUT";
} else {
    document.getElementById("visitorstatus").innerHTML = "LOG IN";
};
});