advance cart click code conflict exact forever hopefully implemented issues javascript load menu navigation non-javascript page pages post problem product provided realized removed restored sits starts steve type update website zip

A website that we implemented e-junkie on is having some issues. When I add a product to the cart on this page: http://www.purelyshea.com/shop_unscented.html, things work fine. However, when I type in a Zip Code, then click "Update Cart", the pages starts to load, then sits there forever and does nothing. Any ideas? I'm using the exact code provided...

Thanks in advance,
-Steve

I realized that there is some kind of a conflict with a javascript menu on the website, because when I removed the menu from the page, it works fine.

I restored the website navigation back to the non-javascript menu, so the page in the above post will work fine now. However, I put up this test page so you can still see the problem & hopefully be able to figure out what's going on: http://www.purelyshea.com/shop_unscented_menu.html

Thanks,
-Steve