<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("div:not(:has(h1))").css("background-color", "yellow");
});
</script>
</head>
<body>
<div>
<h1>This is a heading (h1)</h1>
<p>This is a paragraph.</p>
</div>
<div>
<h2>This is a heading (h2)</h2>
<p>This is a paragraph.</p>
</div>
<div>
<h3>This is a heading (h3)</h3>
<p>This is a paragraph.</p>
</div>
</body>
</html>