public function share()
 {
     $fields = array();
     $US = Users::getUsers();
     while ($U = $US->getNextEntry()) {
         if ($U->getID() == Session::currentUser()->getID()) {
             continue;
         }
         $fields[] = "User" . $U->getID();
     }
     $US->resetPointer();
     echo "<p>In diesem Fenster bestimmen Sie andere Systembenutzer, die auf Ihren Kalender zugreifen können. Falls es andere Systembenutzer gibt.</p>";
     if (count($fields) == 0) {
         return;
     }
     $F = new HTMLForm("shareMailBox", $fields);
     $F->getTable()->setColWidth(1, 120);
     #$F->setValue("MailKontoID", $MailKontoID);
     #$F->setType("MailKontoID", "hidden");
     while ($U = $US->getNextEntry()) {
         $F->setLabel("User" . $U->getID(), $U->A("name"));
         $F->setType("User" . $U->getID(), "select", null, array("none" => "kein Zugriff", "read" => "lesen", "read.create" => "lesen und erstellen"));
     }
     $UD = new mUserdata();
     $shareWith = $UD->getAsArray("shareCalendar");
     foreach ($shareWith as $v => $n) {
         $v = str_replace("shareCalendarTo", "", $v);
         $F->setValue("User{$v}", $n);
     }
     $F->setSaveRMEPCR("Speichern", "", "mKalender", "-1", "saveShare", OnEvent::closePopup("mKalender"));
     echo $F;
 }