<!DOCTYPE html>
<html lang="en-US">
<head>
<link rel="stylesheet" href="/style.css">
<link rel="stylesheet alternate" href="/style-yellow.css" title="Yellow">
<link rel="stylesheet alternate" href="/style-violet.css" title="Violet">
</head>
<body>
<h1>Do the following.</h1>
<p>Open this page in firefox.</p>
<p>Press F10 or tap the Alt key to bring up the "Menu Bar" temporarily.</p>
<p>Click View > Page Style > Choose any style sheet you want.</p>
</body>
</html>