Is this Possible with File Upload

Hi all,

Is it possible to have a file upload or a form field with a button that when pressed instead of getting your computers file directory you can get your upload file directory?

What I would like to do is create a visual file manager/ file directory and put it in a modal/ lightbox. So when an admin is filling in a form there can be a form field that says "select file". When the button associated with this form field is pressed a modal pops up with my file directory and I wll be able to search my directory and select a file from within my site. The file I select will auto-populate my field with the selected file (without refreshing).

Is this possible with form builder or any other extensions.

Thanks in advance