<!DOCTYPE HTML> <html> <head> <title>CSS 2.1 Test Suite: generated content</title> <link rel="author" title="Robert O'Callahan" href="mailto:robert@ocallahan.org" /> <link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" /> <link rel="help" href="http://www.w3.org/TR/CSS21/generate.html#content"/> <meta name="flags" content="" /> <style> div::before { content:url(missing-image.png); } div { border:1px solid green; margin:5px; } </style> </head> <div>Inner</div> </body> </html>