[Zope] Hidden field with a list type

Hi Zopians. My problem is how can I make a hidden field to be a list with a default value? For instance, I try to make the following. REQUEST.form['pno'] contains ['abc', 'def', 'ghi'] <snip> <input type=hidden name="pno:list" value="<!--#var "REQUEST.form['pno']"-->"> When I submit the above page, and try to refer to pno, it doesn't produce the result I want. For example: <snip> <!--#in "REQUEST.form['pno']"--> <!--#var sequence-item--><BR> <!--#/in--> produces only 1 item, "['abc', 'def', 'ghi']" and not 3 items, abc def ghi Thanks for any comments, --Paul