 id="second" style="height:20px;"></div>
<div id="log" style="margin-top:200px;"></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  test(()=> { assert_equals(document.elementFromPoint(50, 10), document.documentElement); }, "above first block");
  test(()=> { assert_equals(document.elementFromPoint(50, 30), first); }, "first block");
  test(()=> { assert_equals(document.elementFromPoint(50, 50), second); }, "second block");
  test(()=> 