Div center

<div id="Layer1" style="margin:0px auto;">

og eksempel:

<!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=iso-8859-1"><title>Ingen titel</title></head>

<body>

<div id="Layer1" style="margin:0px auto;width:100px;background:red;">a</div>

</body></html>

og et mere:

<!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=iso-8859-1"><title>Ingen titel</title></head>

<style type="text/css">
html,body{margin:0px;padding:0px;}
</style>

<body>

<div id="Layer1" style="margin:0px auto;width:400px;background:blue;">a</div>

<div class="top" style="position:absolute;left:0px;top:10px;width:100%;">
<div id="Layer2" style="margin:0px auto;width:100px;background:red;">a</div>
</div>

</body></html>

og en mere med absolute ligesom i dit indlæg...

<!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=iso-8859-1"><title>Ingen titel</title></head>

<style type="text/css">
html,body{margin:0px;padding:0px;}
</style>

<body>

<div id="Layer1" style="margin:0px auto;width:400px;background:blue;">a</div>

<div id="Layer2" style="position:absolute;left:50%;top:10px;margin-left:-225px;width:450px;background:red;">a</div>

</body></html>

og tak for point forresten :)