.center { margin:auto; width:728px; } body { background-image:url('img_index.1.jpg'); background-repeat:no-repeat; background-position: left top; margin-right: auto; margin-left: auto; width: 728px; } h1 { position:absolute; margin-left: 300px; width: 728px; top: 15px; } h2 { position:absolute; margin-left: 300px; width: 728px; top: 50px; color: red; } #nav { width: 728; float: left; margin: 0 0 1em 0; padding: 0; background-color: #f2f2f2; border-bottom: 1px solid #ccc; } #nav ul { list-style: none; width: 800px; margin: 0 auto; padding: 0; } #nav li { float: left; } #nav li a { display: block; padding: 8px 15px; text-decoration: none; font-weight: bold; color: #069; border-right: 1px solid #ccc; } #nav li:first-child a { border-left: 1px solid #ccc; } #nav li a:hover { color: #c00; background-color: #fff; }