<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr"> <head> <title>CSS Test</title> <style type="text/css"> div { border: solid 1px red; } #topRight { float:right; width: 250px; height:100px; } #top { width:50%; } #bottomLeft { float: left; clear: both; } </style> </head> <body> <div id="topRight"> TOP-RIGHT<br /> float:right;<br /> width: 250px;<br /> height:100px; </div> <div id="top"> TOP<br /> width:50%; </div> <div id="bottomLeft"> BOTTOM-LEFT<br /> float: left;<br /> clear: both; </div> </body> </html>