Expanding Tabs not working civiCRM 4.4.5 on Firefox 28 windows 7

Hi,

The clickable buttons is not working
The expandable Tabs is not expanding
The tabs is not either showing correct view.

The issues is the same on Firefox 28 / IE 11.

I have tried to login from a MacBook Pro using Firefox, this works fine.

I have tried to clean the cache on the browser, and also deleted the content under /var/www/html/joomla/media/civicrm/templates_c

I am using Joomla 2.5.19

Please suggest what I can do to resolve this issue.

Best regards Tomas