buttons in BSP

Hi,

I have a button say A which does not have onClick attribute in its attribute list(some button handler class in standard SAP).When this button is pressed it opens up a popup (all coded inside the standard SAP class). When this popup is closed and I return to the parent page I need to have a server round trip. Please suggest how should I go about. One way I thought of was use hidden htmlb button. But i do not know how to proceed with this solution.

Please suggest.

Thanks,

S Sarma.