var client_id = 1;

var resolution = window.screen.width + 'x' +
                 window.screen.height + 'x' +
                 window.screen.colorDepth + 'bit';

document.write(
  '<img src="http://log.sz-online.de/cgi-bin/image.php?' +
  'client_id='              + client_id + '&' +
  'document='               + szoPath + '&' +
  'document_url='           + document.URL + '&' +
  'referer='                + document.referrer + '&' +
  'add_data[]=resolution::' + resolution + '&' +
  'd='                      + (Math.random()*100000) + '&' +
  '" alt="szobox" width="1" height="1" />'
);