function Popup(url){
	var gauche = 0;
	var haut = 0;
	var width = Math.round(screen.width);
	var height = Math.round(screen.height);
	var affichage='location=no,toolbar=no,scrollbars=yes,menubar=yes,resizable=yes,status=no,left='+gauche+',top='+haut+',width='+width+',height='+height+'';
	window.open(url,'mypopup',affichage);return true;
}