I saw in hobo-rapid.js that a event is added to form.filter-menu, but
I couldn't trace down how its finally got activated.
The problem is when I add a own filter-menu item, it doesnt activate
the event.

This is what I have in my index.dryml:

          <form action="&request.request_uri" class="filter-menu"
method="get"><div class="hidden-fields"></div>
            <div>
            <select name="show">
              <option value="">All</option>
              <option value="complete">Complete</option>
              <option value="incomplete">Incomplete</option>
            </select>
            </div>
          </form>

How can I activate the Event.addBehaviour for this filter-menu?
Maybe someone also knows how to use a enum in the filter-menu options
to prevent writing everything again...

Thanks,
Sebastian