function metriweb(page){
  var site = new String('ROULARTA');

  var MetriwebRandomNumber = new String(Math.random());
  document.write ('<img src="http://easy.roularta.be/zoekers/log/' +
  'log.jsp?site=' + site + '&page=/' + page +
  '&R=' + MetriwebRandomNumber + '" width="1" height="1">');
}