I do use no-script and adblock and the Cox popup is not deterred by either one.
noscript by default blocks this, you must have it set rather permissive. Just set it to block scripts from 184.178.98.101 (assuming that's the only server they have feeding the script but you should be able to find it in the dropdown list either way).
Yup, it happened when I "allowed all" on my own webpage so I could view some flash content I had installed. The 184.178.98.xx IP was allowed and the pop-ups were no longer blocked anywhere. -- Politicians are the only people in the world who create problems and then campaign against them. (Charlie Reese)