MS CRM 2011:How to check parent record is dirty?

Dear All,

I am adding Email activity on Case form and updating one field on Case  from the Email activity.I want to check whether Case form is dirty or not before I update the Case.I used below  JS

window.top.opener.parent.Xrm.Page.data.entity.getIsDirty();

but its showing data as null and not working.Please suggest me the solution.

Regards,

Yusuf

If you find this post helpful then please "Vote as Helpful" and "Mark As Answer". Thanks and Regards, Mohammad Yusuf Ansari http://microxrm.blogspot.in