function ouvrir(url,largeur,hauteur)
{
	var popup; var h,w; var t,l;
w=largeur; h=hauteur;	l=(screen.width-w)/2;	t=(screen.height-h)/2;
popup=window.open(url,'ouverte','top='+t+',left='+l+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,height='+h+',width='+w);
popup.focus();}