static public function list_available_panos($base_dir) {

	  $dir = opendir($base_dir);

	  $ret = array();

	  $finfo = finfo_open(FILEINFO_MIME_TYPE); // Retourne le type mime du fichier

	  while(false !== ($filename = readdir($dir))) {

		  if (!preg_match('/^\.\.?$/', $filename)) {

			  $ftype = finfo_file($finfo, $base_dir.'/'.$filename);

			  if (isset($ftype)) {

				  $pano = array(

				    'comment' =>  $filename,

				    'title' => sprintf('fichier de type %s', $ftype)

				  );

			  } else {

				  $pano = array(

				    'comment' =>  sprintf('<samp>%s</samp>', $filename),

				    'title' => ''

				  );

			  }

			  $pano['filename'] = $filename;

			  $ret[] = $pano;

		  }

	  }

	  return $ret;

  }

?>