Child Mashup Refresh

I have parent mashup and 2 child mashups. I am showing the child mashup as pop ups.
The flow of pop up is

1. A button is clicked in parent mashup and child mashup A will show up.

2. A button in child mashup A is clicked and child mashup B will show up without A closing.

3. A button in child mashup B is clicked to update values in A and close mashup B.

4. Mashup A is present after closing of B but data did not update real time.

How to enable refresh real time for mashup A?