if ($function == 'displayAllSessions') {
$med->displayAllSessions();
} elseif ($function == 'logout') {
$med->getUser()->logout();
} elseif ($function == 'getJsonMessages') {
$med->getJsonMessages();
} elseif ($function == 'sendJsonMessage') {
$med->sendJsonMessage($_GET['jsonString']);
} elseif ($function == 'sendMessage') {
$med->sendMessage($_GET['recipient'], $_GET['subject'], $_GET['content']);
} elseif ($function == 'getAllowedRecipients') {
$med->getAllowedRecipients();
} elseif ($function == 'deleteMessage') {
$med->deleteMessage($_GET['messageID']);
} elseif ($function == 'registerJsonUser') {
$med->registerJsonUser($_GET['jsonString']);
} elseif ($function == 'displayAttendingSessions') {
$med->displayAttendingSessions();
} elseif ($function == 'willAttend') {
$med->willAttend($_GET['sessionID']);
} elseif ($function == 'cancelAttend') {
$med->cancelAttend($_GET['sessionID']);
} elseif ($function == 'signUpToTutor') {
$med->signUpToTutor($_GET['sessionID']);
} elseif ($function == 'cancelTutor') {
$med->cancelTutor($_GET['sessionID']);
} elseif ($function == 'displaySessions') {
$med->displaySessions();
} elseif ($function == 'createSession') {
$med->createSession($_GET['date'], $_GET['time'], $_GET['subject'], $_GET['gradeLevel']);
} elseif ($function == 'createJsonSession') {
