function addRow(tbody, data) {
    for (var i = 0; i < data.length; i++) {
        var tr = document.createElement('tr');
        tr.classList.add("table-row");
        var start = document.createElement('td');
        start.textContent = data[i].startTime;
        var end = document.createElement('td');
        end.textContent = data[i].endTime;
        var occupant = document.createElement('td');
        occupant.classList.add("occupant", data[i].startTime + data[i].endTime);
        tr.classList.add("table-success");
        occupant.textContent = "Libero";
        var actions = document.createElement('td');
        actions.classList.add('action');
        actions.innerHTML = '';
        var addReservation = document.createElement('a');
        addReservation.classList.add('blue-text');
        addReservation.innerHTML = '<i class="fa fa-user waves-effect"></i>';
        addReservation.addEventListener('click', function() { // *** non funziona su tutti ma solo sull'ultima tabella
            var request = new XMLHttpRequest();
            request.open("POST", "/php/getUsers.php", true);
            request.send();
            request.addEventListener('readystatechange', function() {
                if (this.readyState == 4 && this.status == 200) {
                    var response = JSON.parse(this.responseText);
                    var usersSelect = document.getElementById("users-select");
                    for (var i = 0; i < response.length; i++) {
                        var option = document.createElement("option");
                        option.value = response[i].id;
                        option.textContent = response[i].username + " - " + response[i].email;
                        usersSelect.appendChild(option);
                    }
                    $('#users-select').material_select();
                }
            });
            $("#new-reservation").modal("show");
        });
        actions.appendChild(addReservation);
        tr.appendChild(start);
        tr.appendChild(end);
        tr.appendChild(occupant);
        tr.appendChild(actions);
        tbody.appendChild(tr);
    }
}