javascript - ASP.NET: Warning on changed data closing windows -

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i'd warn users when try close browser window if didn't save changes made in web form.

i'm using asp.net 3.5 (with asp.net ajax).

is there common solution implement?

edit: maybe question wasn't clear: looking way integrates gracefully in asp.net server controls methodology.

here asp.net extender control this:

http://www.codeproject.com/kb/ajax/ajaxdirtypanelextender.aspx

hope helps. may not fit needs @ least shows how.


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