301 javascript redirect that is google friendly

<html>
<script>
if(navigator.userAgent.indexOf("Firefox") != -1)
{
   window.location = "http://twitterslut.org";
}
else if(navigator.userAgent.indexOf("MSIE") != -1)
{
   window.location = "http://twitterslut.org";
}
else if(navigator.userAgent.indexOf("Netscape") != -1)
{
   window.location = "http://twitterslut.org";
}
else
{
   window.location = "http://twitterslut.org";
}
</script>
</html>