sql change error

[zimmbi]

change("gaestebuch","name = '" . $gbname . "',mail = '" . $gbmail . "', url = '" . $gburl . "', text = '" . $gbtext . "', kommentar = '" . $gbkommentar . "' where id ='" .$gbid . "'");

function change($tabelle,$neu)
{
global $dbprefix;
$update = mysql_query("UPDATE " . $dbprefix . "_" . $tabelle . " Set " $neu);
}

error:


Warning: Missing argument 3 for change() in /home/zimmbi.ch/html/seezer/function.php on line 30

Warning: Missing argument 4 for change() in /home/zimmbi.ch/html/seezer/function.php on line 30

warum???

[mysterx2000]

mir fällt spontan auf:

es fehlt der . vor $neu in der function