[Typo3] alternating login images - how to set $GLOBALS['TBE_STYLES']['loginBoxImage_rotationFolder']

[Rupert Germann]

Rainer (Rene) Suthoelder wrote:
> doing so, what does your localconf.php look like then?
> i thought that i am supposed to add this value there...

to add this value to the localconf.php was also the first thing I tried. 

then I found an example for writing to the TBE_STYLES array in this
extension:
http://typo3.org/extensions/repository/search/skin1/details/

take a look at the file ext_tables.php

greets
rupi