How Can I know about any change happened in the page??

........... I Use JDev 11g ........
How Can I know if any change happened in the page???
for example:
I have a page and I press a creation button that create a new row in view object I want when I press any button that will call another page the page ask a user Are you want to save changes? before leaving a page.
Or
I edit the value in a view object but not committed ( I didn't commit the data in database ) . When I want to leave the page I want to display a message say : Are you want to save changes?
How can I do that?
Thank You...
Sameh Nassar

Check out http://radio.weblogs.com/0118231/stories/2004/09/23/notYetDocumentedAdfSampleApplications.html Example 60. Do not go by the 'on page load' name... This approach will allow you to plug in your custom code at any 'phase' of your adf life cycle. You can capture any request coming from your page, and check for pending transaction states and act accordingly.. I realize that the reply is a little abstruse, but this is not a drag-drop-smile requirement.. :-)
http://download.oracle.com/docs/html/B25947_01/bcdcpal005.htm#sm0271
Julian

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How Can I know about any change happened in the page??

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