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<!DOCTYPE html>
<html>
<head>
<style>
h1::after {
    content: url(smiley.gif);
}
</style>
</head>
<body>

<h1>This is a heading</h1>
<p>The ::after pseudo-element inserts content after the content of an element.</p>

<h1>This is a heading</h1>
<p><b>Note:</b> IE8 supports the content property only if a !DOCTYPE is specified.</p>

</body>

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</html>