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.



Thanks.

Could you please provide completed demo to reproduce the issue?