[s.cool.men]

ExoDetector.detectCensorship(function(adBlockIsOn){
new_var = adBlockIsOn;
});

alert(window.new_var); // return undefined

Возвращает undefined вместо true,false

Код функции

var ExoDetector = {
    domain_base: "exosrv.com",
    detectCensorship: function(onComplete)
    {
        var testDomEl = document.createElement('iframe'),
            randomNum = Math.floor(Math.random() * (10000 - 123 + 1)) + 123,
            protocol = window.location.protocol,
            id = 'adsbox_ex_' + randomNum,
            block = false;

        testDomEl.setAttribute('height', "1px");
        testDomEl.setAttribute('width', "1px");
        testDomEl.setAttribute('id', id);
        testDomEl.setAttribute('class', 'adsBox pub_300x250 pub_300x250m pub_728x90 text-ad textAd text_ad text_ads text-ads text-ad-links');
        testDomEl.setAttribute('style', "width: 1px !important; height: 1px !important; position: absolute !important; left: -10000px !important; top: -1000px !important; box-sizing: content-box !important; border-width: 0px !important;");

        var testScript = document.createElement('script');
        testScript.src = protocol + "//ads." + ExoDetector.domain_base + "/ads.js";
        testScript.onerror = function() {
            block = true;
        };

        document.body.appendChild(testDomEl);
        document.head.appendChild(testScript);

        var done = function () {
            if (typeof onComplete == 'function') {
                onComplete(block);
            }
            document.body.removeChild(testDomEl);
        };

        var domDetect = function () {
            try {
                var someAd = document.getElementById(id);
                if (someAd === null
                    || someAd.style.display == "none"
                    || someAd.style.display == "hidden"
                    || someAd.style.visibility == "hidden"
                    || someAd.offsetParent === null
                    || someAd.offsetHeight == 0
                    || someAd.offsetLeft == 0
                    || someAd.offsetTop == 0
                    || someAd.offsetWidth == 0
                    || someAd.clientHeight == 0
                    || someAd.clientWidth == 0
                ) {
                    block = true;
                }
                if (window.getComputedStyle !== undefined) {
                    var style = window.getComputedStyle(someAd, null);
                    if(style && (style.getPropertyValue('display') == 'none' || style.getPropertyValue('visibility') == 'hidden')) {
                        block = true;
                    }
                }
            } catch (err) {
            }
        };

        setTimeout(domDetect, 500);
        setTimeout(done, 550);
    }
};