    <head>
    <style type="text/css">
    body{
        margin:0px;
        background:#000;
    }
    .header {
        height:50px;
        background:#F0F0F0;
        border:1px solid #CCC;
        width:960px;
        margin:0px auto;
    }
    .content {
        width:960px;
        background: #F0F0F0;
        border: 1px solid #CCC;
        height: 2000px;
        margin: 20px auto;
    }
    </style>
    </head>
    <body>
     
        <div></div>
     
        <div></div>
