function html_banner(zanox_tracking_url, zanox_tracking_param, width, height) {
  var zanoxlink = encodeURIComponent(zanox_tracking_url + '?' + zanox_tracking_param + '=');
  var url = 'http://ads.nix-wie-weg.de/banner_' + width + 'x' + height + '.html?agent=zanox&clickTag=' + zanoxlink;
  document.write('<iframe width="' + width + '" height="' + height + '" ');
  document.write('noresize="noresize" scrolling="no" frameborder="0" marginheight="0" marginwidth="0" ');
  document.writeln('src="' + url + '"></iframe>');
}