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  || document.referrer.indexOf("://www.google.be") != -1 // http://www.google.be*
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  || document.referrer.indexOf("://www.mountainbike.startpagina.nl") != -1 // http://www.mountainbike.startpagina.nl*
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  || document.referrer.indexOf("://www.netlog.nl") != -1 // http://www.netlog.nl*
  || document.referrer.indexOf("://www.netlog.com") != -1 // http://www.netlog.com*
//  || document.referrer == '' // direct request
) {
  document.write('<div id="newsletter" class="topic" style="z-index: 200; width: 240px; height: 292px; background: #fff; position: absolute; top: -250px; left: 50%; margin-left: -450px; border: 1px solid">');
  document.write('  <div class="gradiet">');
  document.write('    <p class="topic_top1"><b>Welkom op MTB-You</b></p>');
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  document.write('      <form method="post" action="/nieuwsbrief.php">');
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  for (i = 1; i < 20; i++) {
    var yposition = (14*i)-200;
    window.setTimeout("document.getElementById('newsletter').style.top = '"+yposition+"px'",800+(50*i));
  }
}

function bookmarksite(title, url, object) {
  if (document.all) {
    window.external.AddFavorite(url, title);
    return false; 
  } else if (window.sidebar) {
    window.sidebar.addPanel(title, url, "");
    return false; 
  } else if (window.opera && window.print) {
    object.rel = 'sidebar';
    object.href = url;
    object.title = title;
    return true; 
  } else {
    return false; 
  } 
}