how to pass the value to the next page ???

hello everybody!!
        i am a freshbird in webwork.
        i have a problem , when i click the submint button, debug in the action, why the values(just show, not input values, and the values are selected from database) show in the page become null. i have tried many methods to solve this , also use the[i] <ww:hidden/>[/i] and session.but the[i] <ww:hidden/>[/i] tag is useless when i want to pass a list, and  i don't want to use session.
        so anybody has another good way to solve the problem??
        the [i]scope interceptor[/i] also use session , but i don't know how to use it, can anybody told me how to use it??
        thanks very much !!!!
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