html-清除悬浮问题
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>html-清除悬浮问题</title>
</head>
<body>
<div class="1" style="width:100px">
<div class="2" style="float:left">2222</div>
<div class="3" style="float:right">3333</div>
<div style="clear:both"></div>
</div>
</body>
</html>
