OF JS example

<div id="fund" class="fund"></div>
<script type="text/javascript">
    var s = document.createElement('script');
    s.type = 'text/javascript';
    s.async = true;
    s.src = "https://onlinefundraising.dk/js/3.5/iframe.js";
    var x = document.getElementsByTagName('script')[0];
    x.parentNode.insertBefore(s, x);
    function OFfit() {
        if (window.iFrameResize) {
            iFrameResize({
                enablePublicMethods: true,
                checkOrigin: false
            });
        }
    }
    function OF() {
        var a = 'pre_device=' + window.innerWidth,
                b = window.location.search.substring(1),
                d = '';
        if (b) {
            if (b !== 'undefined') {
                d = "&" + b;
            }
        }
        var uri = "http://of.devflowtwo.com/chr/?" + a + d,
            src = uri.replace(/amp;/g, "").replace(/#038;/g, ""),
            iframe = document.createElement('iframe');
        iframe.width = "100%";
        iframe.scrolling = "no";
        iframe.setAttribute("src", src);
        iframe.setAttribute("frameBorder", "0");
        document.getElementById('fund').appendChild(iframe);
        OFfit();
    }
    if (window.addEventListener) {
        window.addEventListener("load", OF, false);
    } else if (window.attachEvent) {
        window.attachEvent("onload", OF);
    } else {
        window.onload = OF;
    }
    function OF_setCookie(cname, cvalue, exdays) {
        var d = new Date();
        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
        var expires = "expires=" + d.toUTCString();
        document.cookie = cname + "=" + cvalue + "; " + expires;
    }
    function OF_getCookie(cname) {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) === ' ') {
                c = c.substring(1);
            }
            if (c.indexOf(name) === 0) {
                return c.substring(name.length, c.length);
            }
        }
        return "";
    }
    function OF_hasCookie(cname) {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) === ' ') {
                c = c.substring(1);
            }
            if (c.indexOf(name) === 0) {
                return true;
            }
        }
        return false;
    }
    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m);
    })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
    function OF_sendTrack(obj) {
        ga('create', 'UA-50839665-7', 'auto');
        ga('send', 'pageview');
        ga('require', 'ecommerce');
        ga('ecommerce:addTransaction', {
            'id': '' + obj['postid'],
            'affiliation': obj['affiliation'],
            'revenue': '' + obj['amount']
        });
        ga('ecommerce:addItem', {
            'id': '' + obj['postid'],
            'name': '' + obj['project_name'],
            'category': '' + obj['category'],
            'price': '' + obj['amount'],
            'quantity': '1'
        });
        ga('ecommerce:send');
    }
    var url = location.search;
    var result = '';
    var sURLvar = url.split(String.fromCharCode(38));
    for (var i = 0; i < sURLvar.length; i++) {
        var sParName = sURLvar[i].split('=');
        if (sParName[0] === 'tp') {
            var result = sParName[1];
        }
    }
    if (result) {
        var obj = JSON.parse(atob(result));
        var postCookie = 'has_sent_' + obj['postid'];
        if (!OF_hasCookie(postCookie)) {
            OF_setCookie(postCookie, 'sent', 10000);
            OF_sendTrack(obj);
        }
    }
</script>