Hi,
I’m using “DhtmlHistory” JavaScript class to simulate Back button and bookmarking in my Ajax project.
Now your AV know it as “HTML:Iframe-inf… virus/worm” and then Interrupt the connection. :
You can see it in my site at : http://Talahost.com
All of this problems begins from when I decide to use that js class
Now I can not see what you say because of Avast! and I can not turn off on access protection (pass required → I have not)
Since you the author of the site don’t know where that iframe came from that is pointing to internetcountercheck.com, that you should remove that iframe tag.
When you remove that iframe tag I think you will find it has nothing to do the the js class but the malicious iframe tag.
Just look at these google results for that domain name and see how many relate to it being found in hacked sites and that it is a malicious site.
You shouldn’t shoot the messenger (disable the web shield), but remove the malicious iframe tag/s from your site to avoid other people (not having avast protection) possibly getting infected.