example.html

<!DOCTYPE html>
<html>
<head>
    <style>
        div.relative {
            position: relative;
            width: 400px;
            height: 200px;
            border: 3px solid #73AD21;
        }

        div.absolute {
            position: absolute;
            top: 80px;
            right: 0;
            width: 200px;
            height: 100px;
            border: 3px solid #73AD21;
        }
    </style>
</head>
<body>

<h2>position: absolute;</h2>

<p>An element with position: absolute; is positioned relative to the nearest positioned ancestor (instead of positioned relative to the viewport, like fixed):</p>

<div class="relative">This div element has position: relative;
    <div class="absolute">This div element has position: absolute;</div>
</div>

</body>
</html>