function popupWindow(page,name,w,h) {
  var win=null;
  LeftPosition=(screen.width)?(screen.width-w)/2:100;
  TopPosition=(screen.height)?(screen.height-h)/2:100;
  settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars=yes,location=no,directories=no,status=yes,menubar=no,toolbar=no,resizable=no';
  wind = window.open (page,name,settings);
}