var referrer_exclude = new Array('stumbleupon.', 'reddit.', 'twitter.', 'digg.');

var referrer = document.referrer;
var ads_cookie = document.cookie.match('(^|;) ?advhelp_show_ads=([^;]*)(;|$)');

var show_ads = true;

if (referrer != '') {
    for (var i = 0; i <= referrer_exclude.length - 1; i++) {
        if (referrer.indexOf(referrer_exclude[i]) !== -1) {
            var expiry = new Date();
            expiry.setTime(expiry.getTime() + 3600);
            document.cookie = "advhelp_show_ads=0; expires=" + expiry + "; path=/; domain=burnabrain.com";
            show_ads = false;
        }
    }
}

//if (!(show_ads == false || (ads_cookie != null && ads_cookie[2] == 0))) {
if (!(show_ads == false)) {
    document.write(unescape("%3Cscript src='http://pagead2.googlesyndication.com/pagead/show_ads.js' type='text/javascript'%3E%3C/script%3E"));
}