<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title></title>
<style>
div#center{
width:80%;
height:80%;
position:fixed;
top:50%;
left:50%;
margin-left:-40%;
margin-top:-40%;
background-color:#0000FF;
}
div#topleft{
width:200px;
height:200px;
background-color:#FF0000;
position:fixed;
top:0;
left:0;
}
div#topright{
width:200px;
height:200px;
background-color:#00FF00;
position:fixed;
top:0;
right:0;
}
div#bottomleft{
width:200px;
height:200px;
background-color:#FFFF00;
position:fixed;
bottom:0;
left:0;
}
div#bottomright{
width:200px;
height:200px;
background-color:#00FFFF;
position:fixed;
bottom:0;
right:0;
}
</style>
</head>
<body>
<div id="center">
</div>
<div id="topleft">
</div>
<div id="topright">
</div>
<div id="bottomleft">
</div>
<div id="bottomright">
</div>
</body>
</html>