Sticky banners for a12.com

<script>
(function(d,w){
    let adUnitSiteId    = "221279";
    let adUnitsSettings = [
        {
            adUnitId: "677206",
            elementSelector: "body",
            position: "top"
        },
        {
            adUnitId: "677204",
            elementSelector: "body",
            position: "top"
        }
    ];

    (function(){
        let ss = d.querySelector("script[src=\"//s.clickiocdn.com/t/" + adUnitSiteId + "/360.js\"]");
        let s = d.createElement("script");
        s.src = "//s.clickiocdn.com/t/" + adUnitSiteId + "/360" + ((ss)?"":"_light") + ".js";
        s.async = "async";
        d.querySelector("head").appendChild(s);
    })();

    function addContainer(cId, s, p) {
        let c = d.createElement('div');
        c.id  = cId;
        let e = d.querySelector(s);
        if(e)
        {
            if (p && p === "top")
            {
                let ch = d.querySelector(s + " > :first-child");
                if(ch) e.insertBefore(c, ch)
                else   e.appendChild(c);
            }
            else e.appendChild(c);
        }
        return c;
    }
    let containersId = "clickio_adunit";
    let k = 1;
    adUnitsSettings.forEach(function(adUnit){
        let cId = containersId + "-" + k;
        addContainer(cId, adUnit.elementSelector, (adUnit.position?adUnit.position:false));
        (window.__lxGc__=window.__lxGc__||{'s':{},'b':0}).cmd=window.__lxGc__.cmd||[];
        __lxGc__.cmd.push(function(){
            __lxGc__.display(cId, "_" + adUnitSiteId, "_" + adUnit.adUnitId);
        });
        k++;
    });
})(document, window);
</script>