[jQuery] Navigation conversion

[Allan Mullan]

Hi all,
I'm trying to convert a simple navigation to jQuery (from Mootools) but 
I'm not having the best of luck with it yet, the original is here:
http://www.chromasynthetic.com/blog/wp-content/uploads/2006/09/mootools1.html

So far I have this:
http://www.skorpion.geek.nz/projects/nav2/index.html

But as you can tell, it's not animating it as smoothly - Can anyone help 
with the animation for this?

Thanks heaps in advance
Allan