Serious problems with Internal explorer 9

Serious problems with Internal explorer 9

Hello
I have a problem with IE9 you can see the error at the following link: http://www.eclettikastyle.com/it/anelli-it/anello-acciaio-smalto-blue-swarovski.html
everything works fine but when I go to the tabs of a product that happens, I configured the store with the default template, the only one I have in the dropdown menu.
How can I fix the problem, there is a code module or something? thanks

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