how to access parameters of python script in a ZPT

hi
iam trying to access parameters of a python script which have come from a ZPT and know iam redirecting to a new ZPT page and i want to access the fields ok the old page in these new ZPT page

the code of First ZPT page is

<form action="preview" method="post">
<input type ="text" name="t1">
<input type="submit" name="submit">
</form>

The python script
##parameter=id
response=context.REQUEST.RESPONSE
response.redirect('page')

the Page ZPT

here i want to access the text put in the above zpt page