function open_ext_link($feuille,$n_feuille) {
      window.open('$feuille',
                  '$n_feuille',
                   width=600,
                   height=600,
                   toolbar=no,
                   location=no,
                   directories=no,
                   status=no,
                   menubar=no,
                   scrollbars=no,
                   copyhistory=no,
                   resizable=yes);
}
	  
