codice:
<script type="text/javascript">
<!--

  var dom = document.getElementById ? true : false;
  var opr = window.opera ? true : false;

  var ns = document.layers ? true : false;
  var ie = (document.all && !opr) ? true : false;

  if (opr)
   window.location.href = "opera.html"; 
  else if (ns)
   window.location.href = "netscape4x.html"; 
  else if (ie)
   window.location.href = "http://sopravvoliamo.altervista.org/redirect.html"; 
  else if (dom)
   window.location.href = "mozilla_ns6+.html"; 
  else
   window.location.href = "vers_noscript.html"; 

//-->
</script>