function popupWindow(url, larg, haut) {
	if(larg == undefined) {
		larg = 640;
	}
	if(haut == undefined) {
		haut = 640;
	}
	window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no,width='+larg+', height='+haut+',screenX=30,screenY=30,top=30,left=30');
}