[Zope] how to iterate through two sequence items

[Peter Walerowski]

hello all,
sorry, forgot the subject.

my problem might be simple, but I can't find the solution:
I can iterate through a sequence - let's say a folder content - and display the 
items in a table, but I can't figure out how to display the table in two 
columns.

<dtml-in myFolderContent>
 <tr><td><dtml-var folderItem></td></tr>
</dtml-in>

will print the dates in a single column, but how can I iterate through and refer 
to a second item in one <dtml-in> pass.

somthing like

<dtml-in myFolderContent>
 <tr><td><dtml-var folderItem></td>
     <td><dtml-var folderItem[nextIndex]></td></tr>
</dtml-in>

???

My table should look like this:

  -----------------------
  | 1. item  | 2. item  |
  | 3. item  | 4. item  |
  | ...      | ...      |
  -----------------------

Thanks for help


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