I am a young webdeveloper from Germany.
There is this technology used in this great website that doesn't stop amusing me, I was just hoping someone could cypher the technology behind it and perhaps reveal it is done with the help of some freely available Library
the link to this DSL Internet provider company is:
just insert this postal zip code in there to test the service: 68161
that is a German Zip coad for the city Mannheim. As soon as you type in this post code, the fields of