【tab】
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
h3, .content {
float: left;
}
h3 {
clear: both;
margin-right: 10px;
border-right: 1px solid red;
padding-right: 10px;
margin-bottom: 10px;
}
</style>
</head>
<body>
<h3 id="tab1">tab1</h3>
<div class="content">content for tab1</div>
<h3 id="tab2">tab2</h3>
<div class="content">content for tab2</div>
<h3 id="tab3">tab2</h3>
<div class="content">content for tab2</div>
</body>
</html>
