... in pratica vorrei centrare questa pagina:

<body>

<div id="Layer1" style="position:absolute; left:0px; top:0px; width:760px; height:79px; z-index:1; background-color: #00CC66; layer-background-color: #00CC66; border: 1px none #000000;"></div>
<div id="Layer2" style="position:absolute; left:0px; top:80px; width:120px; height:340px; z-index:2; background-color: #CC3333; layer-background-color: #CC3333; border: 1px none #000000;"></div>
<div id="Layer3" style="position:absolute; left:121px; top:80px; width:518px; height:340px; z-index:3; background-color: #6600FF; layer-background-color: #6600FF; border: 1px none #000000;"></div>
<div id="Layer4" style="position:absolute; left:640px; top:80px; width:120px; height:340px; z-index:4; background-color: #FF9966; layer-background-color: #FF9966; border: 1px none #000000;"></div>

</body>


non mi riesce.