Database locked row when the user closes the browser after a change without saving changes

Hello

I have a page in which the user can enter some data and save it.
When the user asks a row and update it.
Without saving changes, if the browser is closed, next time when the page is loaded for the update, he said that the line of database is locked with the following error.

Error: Cannot lock the file, another user owns the lock.
Unable to lock the file, another user owns the lock.

How we handle this?
We can unlock the line when the browser is closed?

Thanks for any help.
Sameer

Assuming you are using ADF BC to access your database, change the optimistic locking setting:
http://download.Oracle.com/docs/CD/E14571_01/Web.1111/b31974/bcstatemgmt.htm#BABGCDDD

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