Page Locking

DokuWiki locks pages when they are edited by a user. This should avoid conflicts completely (they are still checked for).

• Lockfiles contain the IP address (or username if available) of the one who edits a page - This means users can not lock pages from themselves.
• Lockfiles are removed when
  • they are older than a defined age (15 minutes by default, see locktime)
  • the editing user saves the page
  • the editing user cancels the editing by hitting the cancel button
• When the Preview button is pressed, the age of the lockfile is reset, so if more than 15 minutes for editing is needed just press Preview from time to time
• A JavaScript alert reminds the editor about the expiring lock one minute before it expires.
• When JavaScript is available DokuWiki will refresh the lock in the background while editing the document

Can I edit this behavior? How? The javascript reminder is super annoying, any way to make it non-modal?