Is there any listener when leaving the page?

Hi,
I use JDev 11g,
I use this
*((DCIteratorBinding)this.getBindings.get("MyIterator1")).getViewObject().getApplicationModule().getTransaction.isDirty();*
to know if there is a change happen in database or not
I want to check this change when I leave the page.Where can I write this code? Is there any listener when leave the page or not?
Thank You.
Sameh Nassar

Thank You Sireesha,
I make a class which implements interface PhaseListener and implement 2 methods (beforePhase and afterPhase).
then I write
<lifecycle>
<phase-listener>MyClass</phase-listener>
</lifecycle>
in faces-config.xml file
thank you.
Sameh Nassar

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Is there any listener when leaving the page?

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