Pop-up Annoyence

I have tried all I can think of to stop an annoying Pop-Up when trying to shut down from Netscape 7.2....basically I get a blank rectangular overlay with a Netscape heading??? when I right click to view info I get..........
Untitled Page and a long URL starting with ....HTTP://AR.ATWOLA.COM...........
I'm totally confused.. TNXS

 

Oh, yes and blocking popups may not do anything much. The site is just the visible, but it is important to know what leads to it. And, it took me a while to figure out the problem. I ended up right clicking on the text, and selected Properties. That gave me the website, a very long one. I ended up blocking the site, as well as accepting cookies only for the originating site. And, of course, I deleted the cookies.
I never saw the problem in Netscape7.2 or Mozilla1.7.5, but I saw this, recently, in Firefox1.0. I am blocking cookies from ar.atwola.com, and atwola.com as well the biggest offenders, i.e. casale.com, clicktracks.com and specificclick.net.