<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html> <head> <title>CSS 2.1 Test Suite: Updating layout on display changes</title> <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#display-prop"> <script type="text/javascript"> function test() { document.getElementById('float').style.display = 'none'; } window.addEventListener("load", test, false); </script> <style> #float { width: 100%; float:left; } div { background: red; color: green; width: 1em; font-family: Ahem; } </style> </head> <body> <p>There should be no red below, only green.</p> <div id="float">X</div> <div> X </div> </body> </html>