the popup: just another .aspx webpage that says "sending mails..." and does that. when it's done it does a refresh on itself and shows "done" all you have to do is: open that page in a new browser window (like target="_blank" or use javascript) for more details on how to open popups, refer to google and "javascript tutorials" (maybe selfhtml.org) you could also use a iframe but that 'might' be stupid if the user wants to browse somewhere else... anyways, threads on webpages are not the thing to go for and popups are a matter of html/javascript