code: public void addTagID(String tagID, String name)
      {
          if (_focusMap == null) {
              _focusMap = new HashMap();
          }
          _focusMap.put(tagID, name);
      }
docs: Adds a tagId and name to the Form's focusMap.
  @param tagID the tagID of a child tag.
  @param name  the name of a child tag.