AJAX :: CheckBox Inside Updatepanel CheckedChanged Event Not Firing?

Mar 11, 2011

I have a checkbox, textbox and requiredfieldvalidator inside the updatepanel. Once user checks selects
checkbox I am enabling requiredfieldvalidator.

I have one more textbox, requiredfieldvalidator, validationgroup and Linkbutton outside updatepanel.

Strange thing is Checkbox checked event not firing in some cases,

1. Check the checkbox (which enables requiredfieldvalidator)
2. Click the Linkbutton (fires two validators)
3. Uncheck the checkbox (which should disable requiredfieldvalidator)
4. Click the linkbutton again (again it fires two validator, which should fire only one validator)

Note: The problem only arising when I add javascript block to linkbutton in page load event.

[Code]....

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