Unlock Data when User exits ... (OnUnload)?

[Petra]

Hi!

I don't know how to handle the following problem:

When a User clicks on the detail view of an item, I lock the item in the database. If the user exits with clicking the cancel or ok button I unlock the item and everything works fine.

But if the user exits just closing the explorer window or clicking on an other menu item in the frame, the item is still locked.

I tried to load an aspx script which unlocks the item in the unload event of the body (with iframe), but it works only sometimes.

If you have any ideas how to solve the unlock process ... please let me know ...

Thx!