I guess this is possible, but I don't know how.
<a rel="width[640];height[480];autostart[true];loop[true];title[Google]" class="jcepopup" href="http://www.google.nl">Aanbieding</a>
Can it be done linke this?
<body onload="javascript: laden()">
<script type="text/javascript">
function laden()
{
window.open('http://www.google.nl rel="width[640];height[480];autostart[true];loop[true];title[Google]" class="jcepopup"', 'blablabla', 'width=720', 'heigt=500');
}