Accordion (IE) issue

I’m trying to use an accordion in a tabbar component.

It seem’s to work using Firefox but not in Internet Explorer,

How do I know which version I’m using?

Is that an already solved issue or should I give more information on it?

I’m sorry if I’m too short with my description but I don’t know if it’s easily solved with an upgrade.


Could you please provide completed demo to reproduce the issue?