<!DOCTYPE html>
<meta charset="utf-8"/>
<meta name="referrer" content="origin">
<form method="POST" id="form"></form>
<script>
function onLoad() {
  const params = new URLSearchParams(self.location.search);
  const form = document.getElementById('form');
  form.action = params.get('target');
  form.submit();
}
self.addEventListener('load', onLoad);
</script>
