This is a long shot but I've seen things which might make it posssible.
I have a div, which is filled with images. Album covers if you must know. And I want to allow users to download this as an image. So they could use it as something like a desktop background.
So is this possible? Get this visual representation of an element and display it as an image?
From what I understood from your question you can use an
tag for this. The user can view the image in the browser and can save it to their hard drive.
from your description each of the image inside will be a different album cover, so combining these into a single image won't a good idea.
Assuming I understand the question...If you know the position of the images in the div, you could concatenate the images together server side into a single image. Then just have a button users can click on that will call the function to assemble and download this image.
Basically you can't do that. At least crossbrowser. But if it is not critical. You can try <canvas>
check here http://www.nihilogic.dk/labs/canvas2image/