Fixed pop up button

Dear Kriesi supporter employee,

We have received a quality certificate for our webshop. The website that provides these certificates has send us a HTML code for a pop-up button. I would like to add this button to our website but I’ve been having some difficulties.

They’ve provided the following code:

<script type=”text/javascript”>
(function() {
_webwinkelkeur_id = 1996;
var js = document.createElement(“script”); js.type = “text/javascript”;
js.async = true; js.src = “//www.webwinkelkeur.nl/js/sidebar.js”;
var s = document.getElementsByTagName(“script”)[0]; s.parentNode.insertBefore(js, s);
})();
</script>

They say that this code should be pasted into the HTML HEAD. Could you tell me where I should paste it exactly? Because I have no idea. An example of the pop-up button can be found here: http://www.webwinkelkeur.nl/upload/sidebar-button.html

Thanks in advance,

Kindest regards,

Pim