NINE / Test-WWW-WebKit-0.05 / t / test / attribute.html 
<!DOCTYPE html>
<html>
    <head>
        <title>test</title>
        <style type="text/css">
            #invisible { visibility: hidden; }
            #void { display: none; }
        </style>
    </head>
    <body>
        <div id="test" class="foo bar"></div>
        <div id="invisible">
            I'm invisible!
            <div id="invisible_child">Parent's invisible, so am I</div>
        </div>
        <div id="void">
            I'm void!
            <div id="void_child">Parent's void, so am I</div>
        </div>
    </body>
</html>