<html>
<head>
<style>
#scroller {
position: absolute;
top: 42px;
bottom: 0px;
left: 0px;
right: 0px;
overflow: overlay;
}
#contentarea {
position: absolute;
}
</style>
</head>
<body onload="document.getElementById('bt').focus()">
<div id="scroller">
<div id="contentarea">
This tests that we can scroll to reveal something in a nested positioned block in overflow.
<div style="height: 800px"></div>
<input type="button" id="bt" value="If you can see this, test has passed"></input>
</div>
</div>
</body>
</html>