function launch(name, url, features) {
	var w = window.open( url, name, features );

	if ( w == null ) {
		alert( "Votre système ne dispose plus d'une mémoire suffisante pour ouvrir une nouvelle fenêtre." );
		}
	else {
		if ( w.opener == null ) {
			w.opener = window;
			}

		w.focus( );
		}
	}

function _openwin(name, url, w, h) {
	var ww = w + 20;
	var hh = h + 30;
	var features = "status=no,scrollbars=yes,resizable=yes," + "width=" + ww + ",height=" + hh;
	launch(name, url, features);
	}

function openwin( name, url ) {
	var features = "status=yes,scrollbars=yes,resizable=yes,width=770,height=400";
	launch(name, url, features);
	}