<!DOCTYPE html>
<html lang="en" manifest="{{GET[manifest]}}">
<script>
if (!window.applicationCache) {
  parent.postMessage('application cache not supported');
} else {
  applicationCache.onnoupdate =
    applicationCache.ondownloading =
    applicationCache.onobsolete =
    applicationCache.onerror = function() {
      parent.postMessage('okay');
    };
}
</script>
</html>
