<html>
<head>
<title>Div example</title>
</head>
<body>
<style type="text/css">
.left1 {
float: left;
width: 120px;
padding: 10px;
border: 1px solid;
}
.left2 {
float: left;
width: 120px;
padding: 10px;
border: 1px solid;
clear: left;
}
</style>
<div class="left1">
1
</div>
<div class="left2">
2
</div>
</body>
</html>