Need to create client-side file list view

I'm creating a webpage that must only be used locally (no internet connections). In the menus of this webpage, I need to create a list of files and folders inside a given folder.

I've looked at the jQuery options such as FileTree and see they require processor scripts (server-side), but this cannot call to a server-side script.

The files need to be able to be opened fr0m within the generated lists. I'll be displaying the files in an iFrame when the list item is clicked. I'm already able to do all this with json but that ends up reading static json date being read and requires the browser run in a an insecure mode (not gonna happen).

I seeking a solution that is flexible enough to generate a list based on folder/sub-folder contents as files and folders are pasted into the structure.

Does anyone know of a client-side JS (or other) solution to this?