[Typo3] $this->cObj->IMAGE($img)

[Pierre]

Hi there,

I need to find some documentation about this but i don't find any .. i 
use it in an extension of photo gallery with session handling to 
download a zip of chosen file... And i want something like when you 
click on the thumbnail you have a popup window opening in bigger 
dimension to have a better look onto the pic.
I really don't know how to do that in the TYPO3 way ?
And by the way where can i find some doc about the session hadling of 
TYPO3 ?
Thanks a lot for any help
Cheers
Pierre