Код:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head>
<!-- <meta http-equiv="Content-Type" content="text/html; charset=windows-1251" /> -->
<title>Untitled</title>
<style type="text/css">
HTML, BODY{height:100%;text-align:center;}
</style>
</head><body><script type="text/javascript"></script>
<div style="width:200px;height:200px;margin:-100px auto;position:relative;top:50%;left:0;text-align:left;border:1px solid black;">флэж</div>
</body>
</html>