function map_popup(pageURL)
{
  var w = 992, h = 582;

  var left = (screen.width/2)-(w/2);
  var top  = (screen.height/2)-(h/2);

  var targetWin = window.open (pageURL, 'popup', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);

  return false;
}