// Define popup width, height, screen position, scrollbars
function popup(page, width, height, screen, scroll) {
  window.open(page,'','toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars='+scroll+', resizable=no, copyhistory=no, width='+width+', height='+height+', screenX='+screen+', screenY='+screen+', left='+screen+', top='+screen+',')
}