Asynchronous upload/show of multiple images

[eluser]Rubiz'[/eluser]
Hi all!

I'm with a huge problem... I dont know how to start it.

Well, I have a form with such input types; in this form, I have 3 inputs type text/textarea and 4 inputs type file. The client will be updating his newsletter this way, and the client wants to have an asynchronous preview of images, so the images would be in submited by button click, would load, show loading interface, and would appears in it right place replacing the demo image.

I have an example of application with jquery and json, but I saw it overwrites the prototype features; I would like to use the protoype ones.

Anyone has an idea?