function apri(url, w, h,scorrimento) {
	var l = Math.floor((screen.width-w)/2);
	var t = Math.floor((screen.height-h)/2); 
	var windowprops = "width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",scrollbars=1, resizable=1,";
	popup = window.open(url,'remote',windowprops,scrollbars=scorrimento);
	}