<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>getElementsByTagName Example</title>
</head>
<body>
<p>Paragraph 1</p>
<p>Paragraph 2</p>
<button onclick="highlightParagraphs()">Highlight Paragraphs</button>
<script>
function highlightParagraphs() {
const paragraphs = document.getElementsByTagName('p');
for (let i = 0; i < paragraphs.length; i++) {
paragraphs[i].style.backgroundColor = 'yellow';
}
}
</script>
</body>
</html>