<!DOCTYPE HTML> <html> <head> <title>Testcase for resizing elements that depend on containing block width</title> <style type="text/css"> html, body, iframe { height: 100%; } </style> <script type="application/javascript"> function run() { document.getElementById("toresize").style.width = "750px"; } </script> </head> <body onload="run()"> <iframe style="width: 500px" id="toresize" src="28811-2-inner.html"></iframe> </body> </html>