// JavaScript Document
var w = 600;
  var h = 500;
  var l = Math.floor((screen.width-w)/2);
  var t = Math.floor((screen.height-h)/2);
  var stile = "top=" + t + ", left=" + l + ", width=" + w + ", height=" + h + ", status=no, menubar=no, toolbar=no, scrollbar=no";
     function Popup(apri) {
        window.open(apri, "", stile);
     }