$fehlerScheduler = '<a>Bitte f&uuml;gen Sie zuerst in Schritt 1 einen Prozess hinzu.</a>';
     $openTab = 2;
 } else {
     if ($_POST['scheduler'] == 'Round Robing RR') {
         if (ueberpruefung('quantum') && $_POST['quantum'] + 0 > 0 && $_POST['quantum'] + 0 < 41) {
             $bts_ProcessHandler->resetHandler();
             $bts_ProcessHandler = $bts_scheduler->RoundRobing($bts_ProcessHandler, $_POST['quantum'] + 0);
         } else {
             $fehlerRR = '<a>Das Quantum muss zwischen 1 ms und 40 ms sein.</a><br />';
             $openTab = 2;
         }
         schedulingFehlerCheck($bts_ProcessHandler);
     } else {
         if ($_POST['scheduler'] == 'First Come First Served FCFS') {
             $bts_ProcessHandler->resetHandler();
             $bts_ProcessHandler = $bts_scheduler->verfahren($bts_ProcessHandler, 'FCFS', 0);
             schedulingFehlerCheck($bts_ProcessHandler);
         } else {
             if ($_POST['scheduler'] == 'Last Come First Served LCFS') {
                 $bts_ProcessHandler->resetHandler();
                 $bts_ProcessHandler = $bts_scheduler->verfahren($bts_ProcessHandler, 'LCFS', 0);
                 schedulingFehlerCheck($bts_ProcessHandler);
             } else {
                 if ($_POST['scheduler'] == 'Shortest Job First SJF') {
                     $bts_ProcessHandler->resetHandler();
                     $bts_ProcessHandler = $bts_scheduler->verfahren($bts_ProcessHandler, 'SJF', 0);
                     schedulingFehlerCheck($bts_ProcessHandler);
                 } else {
                     if ($_POST['scheduler'] == 'Longest Job First LJF') {
                         $bts_ProcessHandler->resetHandler();
                         $bts_ProcessHandler = $bts_scheduler->verfahren($bts_ProcessHandler, 'LJF', 0);