<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("div p").first().css("background-color", "yellow");
});
</script>
</head>
<body>
<h1>Welcome to My Homepage</h1>
<p>This is the first paragraph in body.</p>
<div style="border: 1px solid black;">
<p>This is the first paragraph in a div.</p>
<p>This is the last paragraph in a div.</p>
</div><br>
<div style="border: 1px solid black;">
<p>This is the first paragraph in another div.</p>
<p>This is the last paragraph in another div.</p>
</div>
<p>This is the last paragraph in body.</p>
</body>
</html>