[jQuery] How to get values of child popup window

Hi All,

I want to get values set in child popup window using jquery
Example i have opened new window let's say popup1 in that window agin
one popup is opened let's say popup2. In popup2 i have one textbox.
After we close popup2 window i want textbox value in popup1 window.

Can anyonw help me about how to do so using jquery?

Regards,
Sarita