<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<h1 id="h1">Accessibility Test</h1>
<button id="button" aria-describedby="h1">Accessible Button</button>
<div id="slider" role="slider" aria-valuenow="5"
aria-valuemin="0" aria-valuemax="7">slider</div>
</body>
</html>