target-frameset.html | Explore in Territory

<html>
<script>
function changeFrame()
{
    document.getElementsByTagName('frame')[0].style.border = '10px solid blue';
}
window.addEventListener('DOMContentLoaded', changeFrame, false);
</script>
<frameset rows="50%,*" cols="*"> 
    <frame src="target-frameset-frame.html" scrolling="auto">
</frameset>

</html>

chromium/third_party/blink/web_tests/plugins/resources/target-frameset.html