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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Absolutely positioned non-replaced elements with left, width, right and margin-left not auto</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-31 -->
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width" />
        <meta name="flags" content="ahem" />
        <meta name="assert" content="If 'left', 'width', 'right' and 'margin-left' are all not 'auto' and 'margin-right' is 'auto', then solve the equation for 'margin-right'." />
        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
        <style type="text/css">
            #containingblock
            {
                border: solid black;
                direction: rtl;
                height: 200px;
                position: relative;
                width: 300px;
            }
            div div
            {
                /* left + margin-left + border-left-width + padding-left + width + padding-right + border-right-width + margin-right + right = width of containing block */
                /* 100px  + 100px         + 0                 + 0            + 100px   + 0             + 0                  + solve        + 100px = 300px */
                background: red;
                color: blue;
                font: 100px/1 Ahem;
                left: 100px;
                margin-left: 100px;
                margin-right: auto; /* value is solved to -100px */
                position: absolute;
                right: 100px;
                width: 100px;
            }
        </style>
    </head>
    <body>
        <p>Test passes if a filled blue square is in the <strong>upper-right corner</strong> of the black rectangle and there is <strong>no red</strong>.</p>
        <div id="containingblock">
            <div>X</div>
        </div>
    </body>
</html>