function private_cvtime($zeitstring= "19700101000000", $format="short")
// Funktion cvtime : wandelt in einen MySQL Timestamp in ein lesbares Datum um
// Parameter:
// $zeitstring: Zeitstring im MySQL DateTime oder Timestamp Format
// $format = Formatinformation (siehe switch "$format" ...)
	{
	if(ereg("^([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})",$zeitstring,$res1)) $res=$res1;
	elseif(ereg("^([0-9]{4})[-]([0-9]{2})[-]([0-9]{2})[ ]([0-9]{2})[:]([0-9]{2})[:]([0-9]{2})",$zeitstring,$res2)) $res=$res2;
	else $res = array("1970","01","01","00","00","00");
	$year=$res[1]; $month=$res[2]; $day=$res[3]; $hour=$res[4]; $min=$res[5]; $sec=$res[6];
 	switch ($month)
		{
	  	case "01": $monat = "Januar"; break ;
	  	case "02": $monat = "Februar"; break ;
		case "03": $monat = "März"; break ;
		case "04": $monat = "April"; break ;
		case "05": $monat = "Mai"; break ;
		case "06": $monat = "Juni"; break ;
		case "07": $monat = "Juli"; break ;
		case "08": $monat = "August"; break ;
		case "09": $monat = "September"; break ;
		case "10": $monat = "Oktober"; break ;
		case "11": $monat = "November"; break ;
		case "12": $monat = "Dezember"; break ;
	   default: $monat = "'".$month."'";
		}
	switch ($format)
		{
		case "long": $ergstr = $day. ". ". $monat ." ". $year . "   ". $hour . " Uhr ". $min ; break;
		case "short": $ergstr = $day. ". ". $monat ." ". $year ; break;
		case "dmy": $ergstr = $day. ".". $month .".". $year ; break;
		case "dmy_hms": $ergstr = $day. ".". $month .".". $year." ".$hour.":".$min.":".$sec ; break;
		case "timestamp": $ergstr = mktime(intval($hour), intval($min), intval($sec), intval($month), intval($day), intval($year)); break;
	    default: $ergstr = $monat ."/". $year ;
	   	}
	return ($ergstr);
	}	 // function cvtime ENDE