[Zope] Object ids in the select

[Sin Hang Kin]

If I have the code :

<form action="setmember" method="post">
<select name="members" size="10" multiple>
<dtml-in catalog>
   <option value="<dtml-var catalog.getobject(data_record_id_)>">
   <dtml-var title>
   </option>
</dtml-in>
</select>
<input type="submit" value="addmembers">
</form>


How I can retrieve the object-ids in setmember. If setmember is a python
method, what is passed to it?

I have the which collect objects in its attribute as a list.