function PopupCentrata(my_file,w,h) {

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

   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
      window.open(my_file,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l +",scrollbars=yes");
 }