The thing I want to do is the following. This is the GUI I created so far:
It is an app to be used (mainly) by our Call Center to quickly find telephone numbers and system numbers for the systems installed throughout the country.
Select a city (1), select the customer (2), select the equipment (3) and see the contact and contract info (4). It would be nice to also show an image there, indicated by the red box. Because of compliance issues I cannot post the whole sourcecode, but I hope this makes it clear what I am trying to accomplish. The 8-digit number is also the number in the URL I posted before.
Because of the number of possibilities (thousands of images) I do not want to download all images but just show them on the fly.