<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("div p:last-child").css("background-color", "yellow");
});
</script>
</head>
<body>
<p>The first paragraph in body.</p>
<div style="border:1px solid;">
<p>The first paragraph in div.</p>
<p>The last paragraph in div.</p>
</div><br>
<div style="border:1px solid;">
<p>The first paragraph in another div.</p>
<p>The last paragraph in another div.</p>
</div>
<p>The last paragraph in body.</p>
</body>
</html>