[jQuery] What's deprecated in this suckerfish code?

[andjules]

I know about the superfish plugin, but I found some older, much
lighter code here:
http://be.twixt.us/jquery/suckerFish.php
The funny thing is, when I copy the exact page and his 2006-era copy
of jQuery to my local dev, it works like on his page. If I replace the
jQuery with a modern 1.2.x copy, it doesn't work.
I know the document.all is just a simple IE-only hack, but no matter
what I try, I can't make it work even in FF with a modern jQuery.
Can any of you gurus/folks with fresh eyes see the problem?


          $(document).ready(function(){
                        $("#nav-one li").hover(
                                function() {
                                        $("ul", this).fadeIn("fast");
                                },
                                function() {
                                }
                        );
                if (document.all) {
                                $("#nav-one li").hoverClass ("sfHover");
                        }
          });

                $.fn.hoverClass = function(c) {
                        return this.each(function(){
                                $(this).hover(
                                        function() { $(this).addClass(c);  },
                                        function() { $(this).removeClass(c); }
                                );
                        });
                };