用css+div制作menu

页面源代码：
<body>
    <h2>Tab Menu 1</h2>
<div id="tabs1">
<ul>
    <li><a href="#" title="Link 1"><span>Link 1</span></a></li>
    <li><a href="#" title="Link 2"><span>Link 2</span></a></li>
    <li><a href="#" title="Link 3"><span>Link 3</span></a></li>
    <li><a href="#" title="Longer Link Text"><span>Longer Link Text</span></a></li>
    <li><a href="#" title="Link 5"><span>Link 5</span></a></li>
    <li><a href="#" title="Link 6"><span>Link 6</span></a></li>
    <li><a href="#" title="Link 7"><span>Link 7</span></a></li>
</ul>
</div>
</body>

css代码和图片