PHP4 script to stop pop-ups injected by ISPs

Hi,
Where can I find a PHP4 script capable of identifying ads injected by ISPs and get rid of them? 
Thank you. 

I am not sure about that, but as those ISPs are injecting popups using your gateway, surfing using a proxy would help you.

If my ISP did that I would dumb them in an instant.  I was testing using friend's and neighbour's connections.  Of the seven ISPs I tried, two injected ads while making it appear as if I was doing that on my site.  I already contacted those ISPs, but that's not enough.  I want to be able to block those ads without having to rely on some shitty ISP to do it. 

strange maybe your PC got hacked?

I wish I could help, don't no much about this topic. Useless comment.