function popup(page, largeur, hauteur) {
	param = "toolbar=no,status=no,location=no,directories=no,menubar=no,scrollbars=yes,resizable=yes";
	var top = (screen.height-hauteur)/2;
	var left = (screen.width-largeur)/2;
	window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+param);
}