单行单列3

#wrap{width:800px; min-height:560px; _height:560px; margin:10px auto; border:3px solid #CCC;}

#content {
    position: absolute;
    top: 0px;
    left: 0px;
    margin: 20px;
    width: 74%;

    padding: 10px;
    background: #666;
    border: 5px solid #ccc;
}