How to implement "Please wait your request is being processed" window ?

Hi all,

We are integrating BSP iviews in SAP portal. When the BSP applicaiton is being processed(eg. a form is submitted"), is it possible to show a small window like "Please wait your request is being processed" ? .

Do I need to implement this in the portal or in the BSP applicaiton? Our Applications are created using Web request. Is it possbile to implement this without using the HTMLB

How do I implement this functionality? Any sample code is available?

Thanks and Regards,

Gauri Gosavi.