$bouton = '<input onclick="javascript:ajax_request(
                                \'POST\', 
                                \'?do=sondage&id='.$sondage['id'].'\',
                                \'ajax=true&Monpost1=\'+ document.getElementById(\'bouton\').value,
                                \'responseText\',
                                \'principal\');"
								
								type="image" src="images/login/bouton_voter.gif" title="Voter" name="bouton" id="bouton"/>';