URL: http://cdn-dccs.com/js_f.php?v Infection: JS:Iframe-DHY [Trj]

I am getting almost constant alerts from Avast that URL: http://cdn-dccs.com/js_f.php?v Infection: JS:Iframe-DHY [Trj] has been blocked. It does this when I start up, or if I am switching to run another program.
I have had no adverse affects I am aware of, so Avast seem to be doing what it is supposed to do.
However, I do not understand why this is constantly having to be blocked
Thoughts?

Thanks,
Sarge

 

I use paid version
Gives info of what set it off, the ability to quick or full scan, and some other options not related. I will dig a little more to see if I missed that option
[/I][/B] I use Mozilla Firefox[/I][/B]
B]I haven't found that option if it does

Sarge