Question: I would like to be able to detect if the user is using adblocking software when they visit my website. If they are using it, I want to display a message asking them to turn it off in order to support the project, like [this website](http://www.playonlinux.com/en/) does.

If you enter to that site and your browser has some kind of adblock software enabled, then the site instead of showing the actual ads shows a little banner telling the users that the ad revenue is used for hosting the project and they should consider turning Adblock off.

I want to do that on my website, I'm using adsense ads on it, How can I do that?

Answer: 
```
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>var adb=true;</script>
<script src="./getbanner.cfm?"></script>
<script>
$(document).ready(function(){if(adb)alert('AdBlock!');});
</script>

```

and in getbanner.cfm file:

```
adb = false;

```

I think it's easiest way to detect adblock.
This docuemnt might help.
Most effective way to detect ad blockers
Completely free & easy to implement
<https://www.detectadblock.com/>