导航和浮动初步测试
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>导航条</title>
<link rel="stylesheet" type="text/css" href="">
<style type="text/css">
#{margin: 0;padding: 0;}
ul li{list-style: none; width: 100px;height: 40px;line-height: 40px;text-align: center;background-color: #ccc;margin: 5px 1px;float: left;}
div{width: 200px;height: 200px;background-color: pink;float: left;}
.clear{clear: both;}
</style>
</head>
<body>
<ul>
<li>苹果</li>
<li>栗子</li>
<li>西瓜</li>
<li>葡萄</li>
<li>榴莲</li>
<li>香蕉</li>
</ul>
<div class="clear"></div>
<div>div1</div>
<div>div2</div>
<div>div3</div>
</body>
</html>