pass data between parent page and popup window in asp.net

Question

Hi Friends,

How to post back data from popup page to the parent page with out postback? The popuup page has the data in Datagrid which has the chckboxes.only the records which are selected in the datagrid has to be sent to parent page on the click of submit button in the popup page.

Please help in finding the solution.

thanks,
MSD