userinteraction for a webspider

[Chris]

hi guys,

i would like to to write a little spider, where, occasionally, the user 
has to interact. For example show a log-in page or something similar 
(since everyone has those verification letter/number pics), or send a 
message by hand.

I had the idea of the script relaying the page to localhost but i 
thought there might be an easier way...

Thanks for your help

Chris