protected function plainInsert($table,$contents) {
        $fields=''; $values='';
        foreach($contents as $k=>$v) { 
            $fields.=",".$k; $values.=",:".$k; 
            $this->params[$k]=$v;
        } 
        $fields=substr($fields,1); $values=substr($values,1); // we dont care about UTF-8 - comma always 1 byte
        $this->sth=sprintf("insert `%s` (%s) values (%s)",$table,$fields,$values);
        $this->executeNonQuery();    
        return $this->dbh->lastInsertId();
    
    }
    
    protected function plainUpdate($table,$id,$contents) {
        $temp='';
        foreach($contents as $k=>$v) { 
            $temp.=sprintf(",%s=:%s ",$k,$k);
            $this->params[$k]=$v;
        }
        $this->params[$id['id']]=$id['val'];
        $temp=substr($temp,1); // we dont care about UTF-8 - comma always 1 byte
        $this->sth=sprintf("update `%s` set  %s where %s=:%s",$table,$temp, $id['id'],$id['id']);
        $this->executeNonQuery();    
    }