<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Long Page</title>
<style type="text"></style>
<script type="text/javascript">

    var userWidth = screen.width;
    var userHeight = screen.height;

    function resizePage()
    {
        document.getElementById("long_page").style.width = parseInt(userWidth * 15) + "px";
        document.getElementById("long_page").style.height = parseInt(userHeight * 15) + "px";
    }

</script>
</head>
<body onload="resizePage()">
<div id="long_page"></div>
</html>