event at xulinput (map)

hello,

how can I create an event at  a map of  xulinput element to select an item?
a listener is at the every form, and a single listener at the element on 
the form?

Iterator it = _removeForm.getInputControls();
      while(it.hasNext())
      {
        XulInput input = (XulInput)it.next();
        JComponent comp = (JComponent)input.getJComponent();
        if (JComboBox instanceof comp)
        .....?
      }

steffen