Ad blocker checker?

app/views/layouts/_rsidebar.html.erb

@@ -0,0 +1,35 @@
+<div class="afs_ads">&nbsp;</div>
+<script>
+(function() {
+    var message = "We've detected that you have an ad blocker enabled! Please enable it and help support our work!";
+
+        // Define a function for showing the message.
+        // Set a timeout of 2 seconds to give adblocker
+        // a chance to do its thing
+        var tryMessage = function() {
+            setTimeout(function() {
+                if(!document.getElementsByClassName) return;
+                var ads = document.getElementsByClassName('afs_ads'),
+                    ad  = ads[ads.length - 1];
+
+                if(!ad
+                    || ad.innerHTML.length == 0
+                    || ad.clientHeight === 0) {
+                    //alert(message);
+		    document.write(message);
+                    //window.location.href = '[URL of the donate page. Remove the two slashes at the start of thsi line to enable.]';
+                } else {
+                    ad.style.display = 'none';
+                }
+
+            }, 2000);
+        }
+
+        /* Attach a listener for page load ... then show the message */
+        if(window.addEventListener) {
+            window.addEventListener('load', tryMessage, false);
+        } else {
+            window.attachEvent('onload', tryMessage); //IE
+        }
+})();
+</script>