Custom Media Sorting on WordPress frontend

I have created a unique WordPress theme for showing event photos. Each event album is broken down into child albums that organize photos into groups. I need a plugin that will, using html5, allow users on the frontend to drag photos from one group to another. How everything might work... 1) The user selects one or more images/attachments (your script must allow for this) 2) The user drags the images to a new group 3) As the user moves images over the group, the group background changes to grey with a dashed border. 3) When the user lets the images go over a particular group, the script changes the attachment's parent to the post id of that group. 4) Everything is saved without the page refreshing. Note) The user should only be allowed to change photos for which they uploaded. I could add the user's ID number as a class to the image if that would help. I will provide a secure WordPress development environment and SVN commit access. As you make commits your code will be synced to the staging server. This process allows us to find bugs before they go live. Please let me know any questions you have.