Issue 2661, 2662 and 2663

Resolves issues:
http://code.google.com/p/otwarchive/issues/detail?id=2661
http://code.google.com/p/otwarchive/issues/detail?id=2662
http://code.google.com/p/otwarchive/issues/detail?id=2663

Non-JS users are now taken to a confirmation page, similar to what is used when deleting Works.