Klappers: details en summary

echo "<div class='mt mt_s'>";
	echo "<details>";
	    echo "<summary>Klaptitel</summary>";
	    echo "<div>Content die je wil tonen/verbergen.</div>";
	echo "</details>";
	echo "<details open>";
	    echo "<summary>Klaptitel</summary>";
	    echo "<div>Content die je wil tonen/verbergen.</div>";
	echo "</details>";
echo "</div>";