Take the regular URL for the strpos function, http://php.net/manual/en/function.strpos.php, and you will see:

Now, add prototype as a sub-domain on the URL, http://prototype.php.net/manual/en/function.strpos.php, and a much more readable page is viewed:

The prototype PHP site has been up and operational for at least six months now, and I am beginning to curse the days that I continued to look at the old version of the site when the new look was already available and is so much better. The quick links on the right-hand side will be particularly useful to move around in the API documents.