function actionDefault()
 {
     echo 'Log level: ';
     switch (YDConfig::get('YD_LOG_LEVEL')) {
         case YD_LOG_DEBUG:
             echo 'YD_LOG_DEBUG';
             break;
         case YD_LOG_INFO:
             echo 'YD_LOG_INFO';
             break;
         case YD_LOG_WARNING:
             echo 'YD_LOG_WARNING';
             break;
         default:
             echo 'YD_LOG_ERROR';
             break;
     }
     echo '<br/><br/>';
     echo 'Clearing the logfile<br/>';
     YDLog::clear();
     echo 'Adding debug message<br/>';
     YDLog::debug('debug message');
     echo 'Adding info message<br/>';
     YDLog::info('info message');
     echo 'Adding warning message<br/>';
     YDLog::warning('warning message');
     echo 'Adding error message<br/>';
     YDLog::error('error message');
     echo 'Testing PlainFunction<br/>';
     PlainFunction();
     echo 'Adding very long info message<br/>';
     YDLog::info('this is a very long info message and should break up over several lines in the logfile. Each line should be a separate info message in the logfile if everything goes correctly.');
     echo '<br/><a href="' . YD_SELF_SCRIPT . '?do=showlog">show logfile</a>';
 }