private int getDivColumnNum(TableData t, String divId) {
	Vector v = t.getColNames();
	for (int i = 0; i < v.size(); i++) {
		Object o = v.elementAt(i);
		if (o instanceof Division) {
			Division div = (Division) o;
			if (div.getId().equals(divId)) {
				return i;
			}
		}
	}
	return -1;
}