function popup(page,tx,ty,nom_fenetre,barre_status,barre_outils,barre_scroll)
{
	if (parseInt(navigator.appVersion) > 3)
	{
		x = parseInt((screen.availWidth - tx) / 2);
		y = parseInt((screen.availHeight - ty) / 2);
	}
	else
	{
		x = 50;
		y = 50;
	}
	
	window.open(page,nom_fenetre,"status=" + barre_status + ",toolbar=" + barre_outils + ",resizable=0,scrollbars=" + barre_scroll + ",width=" + tx + ",height=" + ty + ",left=" + x  + ",top=" + y);
	return false;
}
function fermer()
{
	window.close();
}