[TYPO3-core] showpic.php obsolete now...

[Kasper Skårhøj]

Yes, "eID" is something like "extension id".

The value of "eID" is matched with a key in something like  
"$TYPO3_CONF_VARS[FE][...somehting..][...eId...] and if it exists the  
script pointed to by the value is included. The inclusion happens  
very early inside index_ts.php so that only the simple environment,  
few classes and configuration variables are configured. Thus it  
provides low footprint processing to happen in the frontend. I think  
that could be very popular for AJAX implementation in frontend plugins!

- kasper