// 100 items per page
static S pageNav(Map<S, S> params, L<S> keepFields, int count, S nVar) {
  new L<S> l;
  for (int i = 0; i < count; i += 100)
    l.add(tag("a", str(i/100+1), "href", selfLink(params, keepFields, nVar, str(i))));
  ret tag("p", "Pages: " + join("\n", l));
}