Tabbed box issue

I'm using a standard javascript to have a tabbed box: the content is shown if you click on the tab. This is the starting code: [login to view URL] . The problem is that if i put more than a tabbed box in one page the tabber navigation is duplicated. I can modify just the javascript, not the cms (plone) i'm using. I think is an issue that depends on multiple iteration of the tabbed box. [login to view URL] this is the project live and (not) working