Need help replicating an 'ease in/out' effect on one item in a menu bar

Need help replicating an 'ease in/out' effect on one item in a menu bar

Hi guys! Could really do with some help with this - my site is located at http://www.davidmulqueen.kaen.org/RodgersCruiseHire/index.html

Basically, I've altered my JS/JQuery to stop it picking up the last item in a list which comprises my menu bar ('gallery') so it can function as an anchor/link instead of a popout window. Because of this, I've lost the cool ease in on load/ease out on click effect the other menu items have.

Any idea how I'd go about restoring this? Thanks in advance!