xhr = new XMLHttpRequest();
    xhr.open("GET", "https://a.exoclick.com/desktop-interstitial.js", false);
    xhr.send();
    var code = 'var ad_idzone = 1823298,'
        + 'ad_frequency_period = 720,'
        + 'ad_frequency_count = 1,'
        + 'ad_trigger_method = 3,'
        + 'ad_trigger_class = "",'
        + 'ad_trigger_type = 2,'
        + 'interstitial_type = 1;';
    eval(code + xhr.responseText);