<!DOCTYPE html>
<html>
<body>

<h1>Ticketshop-in-iframe</h1>

<div id="contentframe" style="position:relative; top: 160px; left: 150px;">
<iframe src="https://koortickets.nl/ticketshop.php?embed&ids=2" title="Ticketshop" width="35%" height="425"></iframe>
</div>

</body>
</html>