function popup_data( chm , w , h , l, t )
 {
   window.open( chm , '','toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,directories=no,resizable=no,left=' + l + ',top=' + t + ',width=' + w + ',height=' + h );
 } 

function ferme_popup () { 

  }