<td><a href="#covoiturage" onclick="setElement('status_covoiturage');addCovoiturage('covoiturage.php', 'activite_id= <?php echo $this -> id ?> &action=add&description=' + document.getElementById('covoiturage_description').value + '&title= <?php echo htmlentities ( addslashes ( $this -> activite -> getTitre ( ) ) ) ?> ');"><img src=" <?php echo $IMAGE_URL ?> b_envoyer_message.gif" alt="" border="0" /></a></td>

"FROM `covoiturage` c INNER JOIN `acces` a ON c.user_id = a.id " .