Interesting. I can see the error by clicking the tabs and quickly hovering over them. All the JS-stuff seems to be ok.
Only error I can see is that your HTML is incorrect, you are missing a closing </div> (the #bodyContainerWide div is nto closed). This causes the DOM to possibly go wicked even on such as small page, and this could possiblt cause document.ready to missfire in one way or another. I'd first fix the HTML and then try again.
