background-submit-refresh-target Vs on-field-event-update-area

[kranti]

Hi,

Will you please explain the difference between *
background-submit-refresh-target* and *on-field-event-update-area*.
I searched the examples of both in existing trunk, but i couldn't find any.

Regards,
Kranti Agrawal
Student, IIIT Bangalore
krantiagrawal.blogspot.com