var stile = "top=10, left=10, width=250, height=200, status=no, menubar=no, toolbar=no scrollbar=no";
function Popup(apri) {
	//window.open(apri, "", stile);
	var w = 250;
   	var h = 280;
   	var l = Math.floor((screen.width-w)/2);
  	var t = Math.floor((screen.height-h)/2);
        window.open(apri,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l,stile);
}