if(typeof(updateBelievePlayer) == 'undefined')
{
    function updateBelievePlayer(iframe, upc)
    {
        iframe.src = iframe.src.toString().replace(/[0-9]{13}/, upc);
    }
}


(function() {
    <!-- alert('test'); -->
    
    var eIframe   = document.createElement('IFRAME');
    eIframe.src   = 'https://player.believe.fr/v2/3616840795418?embed=1&embedType=5s87fA4E89F465ze&referer='+encodeURIComponent(window.location.toString());
    
    eIframe.style.width        = "350px";
    eIframe.style.height       = "414.166666667px";
    eIframe.style.overflow     = "hidden";
    eIframe.style.border       = "none";
    eIframe.style.marginBottom = "10px";
    eIframe.scrolling          = "no";
    
            var scripts = document.getElementsByTagName('script');
        for(var i = 0, l = scripts.length; i < l; i++){
            
            if(scripts[i].src.match(/.*\/html5player\/3616840795418\/5s87fA4E89F465ze\-350\.js/)){
            
                console.log(scripts[i].parentNode);
                
                scripts[i].parentNode.insertBefore(eIframe, scripts[i]);
                break;
            }
        }
    })();