"Dynamic" website content

[sophie_newbie]

Basically I have written a cgi script to automatically download TIFF
images of patents from the US patent office.

What I want is that the user can see what is happening when the images
are being downloaded, because it takes a while to download them and
there can be anything up to 30 individual files for each image.

Is there a way of using Python or any other means, that I could it
could print on the webpage:

Downloading image 1

Downloading image 2
...
Downloading image X

as the individual pictures are being downloaded so the user doesn't
think the program is hanging?