No can do. The two JSPs exist in separate requests so they cannot share data. The request that generates the first HTML page from the first JSP goes out of scope as soon as the response is sent to the browser. Any scoped variables created on that request go by-by with the request.
If you want to preserve some data across requests you'll either need to store it in the session, or carry it on the page as hidden values (suitable only for text strings).