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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Example of clearing floats</title> <style> .container{ background:yellow; border: 1px solid #000000; } .clearfix:after { content:"."; display:block; height:0; clear:both; visibility:hidden; } .container div { width: 200px; margin: 10px; padding: 10px; } div.red { float: left; background: #ff0000 } div.green { float: right; background: #00ff00; } </style> </head> <body> <div class="container clearfix"> <div class="red">Floated to left.</div> <div class="green">Floated to right.</div> </div> <p><strong>Warning:</strong> Internet Explorer 7 and earlier version does not support the <code>:after</code> pseudo element. IE8 supports, but require a <code>!DOCTYPE</code> to be declared.</p> </body> </html>