Jquery :: Improve Animated Navigation Menu?

On this link you will see my test site:At the moment I am not too happy with the animation on the navigation menu.As you will see as you click quickly through the various links the animation is very jumpy because of the way I have coded it.Also when you click on the gallery page and then select the various gallery images, the animated ball moves all the way to the left.Here is the JQuery code for the animation:

PHP Code:$(function() {//event object (notice it in the parameter list) contains data about the event handled$(".linkbox").mouseover(function(event){//selectedDiv is the clicked object, so you can do what ever u want on the box clicked ;)var selectedDiv = $(this);var divPosition = selectedDiv.position();var divPositionLeft = divPosition.left;$(".circle").animate( {"left": + divPositionLeft}, "100" );})})function movebacka() {Each page has an include file with the nav menu contents, so every time you click a link in the nav menu, a new page has to load, therefor causing the jumpiness in the animation. What are the best ways to resolve these kind of issues.