A negative margin : measurement : Style Basics HTML CSS TUTORIALS

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A negative margin


 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
    <head>
        <title></title>
        <style type='text/css' media='all'>
            body {
                margin: 0;
            }        
            div {
                font-size: 24pt;
                width: 100%;
                color: white;
                background: black;
                margin: -10px;
            }
        </style>
    </head>
    <body>
            <div>
                This div stretches across the whole window and has a negative margin.
            </div>
    </body>
</html>