function popup_preventivo(url) {
		var w = 550;
		var h = 500;
		var l = Math.floor((screen.width-w)/2);
		var t = Math.floor((screen.height-h)/2);
		var stile=  "top=" + t + ",left=" + 1 + ",width=" + w + ",height=" + h + ",status=no, menubar=no, toolbar=no scrollbars=yes";
			window.open(url,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",toolbar=no, scrollbars=yes, status=no");
		}
function popup(url) {
		var w = 470;
		var h = 400;
		var l = Math.floor((screen.width-w)/2);
		var t = Math.floor((screen.height-h)/2);
		var stile=  "top=" + t + ",left=" + 1 + ",width=" + w + ",height=" + h + ",status=no, menubar=no, toolbar=no scrollbars=yes";
			window.open(url,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",toolbar=no, scrollbars=yes, status=no");
		}
function informativa(url) {
		var w = 525;
		var h = 550;
		var l = Math.floor((screen.width-w)/2);
		var t = Math.floor((screen.height-h)/2);
		var stile=  "top=" + t + ",left=" + 1 + ",width=" + w + ",height=" + h + ",status=no, menubar=no, toolbar=no scrollbars=yes";
			window.open(url,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l + ",toolbar=no, scrollbars=yes, status=no");
		}