<body>
<!-- div 1 -->
<div style="top:0px; width:100%; background-color:#333333; height:150px; position:fixed;"></div>
<!-- div 2 -->
<div style="bottom:0px; width:100%; background-color:#66CCFF; height:300px; position:fixed;"></div>
</body>
yine div-2; div-1 in üstüne cıkıyor