<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Chapter 1, Example 2</title>
</head>
<body bgcolor="white">
<p>Paragraph 1</p>
<script>
// script block 1
alert("First Script Block");
</script>
<p>Paragraph 2</p>
<script>
// script block 2
document.bgColor = "red";
alert("Second Script Block");
</script>
<p>Paragraph 3</p>
</body>
</html>
Key source : Beginning JavaScript, 5th Edition (wrox)