Browser compatibility

Browser compatibility

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This is the basic website I'm creating at the moment, and as you will see if you open the link, I implement jquery ui to the extent of an accordion menu with nested buttons for each link. 

My issues:

    Chrome: none (except the animated gif in the home page?)

    FF: the accordion menu appears to work, but each button links the new pages to new tabs, rather than in the "_body" frame. (also the gif doesn't work here)

    IE: The style of the menu changes so that the corners aren't 'rounded,' and while the accordion contracts and opens as desired, the buttons have no functionality whatsoever. (The gif does in fact work)


If anybody has any suggestions, I am fully receptive. 
Please help me!