Specification
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Syntax
<style> #box { background: green; overflow: hidden; /* auto|hidden */ /* for IE8+, Std */ width: 100%; } #left { background: red; float: left; height: 100px; width: 100px; } #right { background: blue; float: right; height: 50px; width: 50px; } </style>
<div id="box"> <div id="left"></div> <div id="right"></div> </div>
Example