Wehkamp - Deduplication for sub domain

<script>
    var date = new Date(); //current date to create the cookie
    var expires; //expire date of the cookie
    var value; //cookie's value
    var url = {{Page URL}}; //current page URL
    date.setTime(date.getTime() + (7 * 24 * 60 * 60 * 1000));
    expires = date.toUTCString();
    value = url.search("utm_source=criteo") != -
        1 ? "criteo" : "other";
    document.cookie = "__utmz=" + value + "; expires=" +
        expires + "; domain=.wehkamp.nl; path=/";
</script>