function PopupCentrata(url) {
   var w = 400;
   var h = 250;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height - h) / 2);
   window.open(url, "", "width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }

 function OpenNewsletter(id) {
     window.open(id, 'n', 'width=790,height=650,status=no,toolbar=no,menubar=no,location=no,resizable=yes,scrollbars=yes');
 }