I despise Pop Up Windows!!
Most people probably already know this but here it is anyway.
It's so simple. Just turn off your Java. That's it.
Just goto edit then preferences then advanced then un check the boxes corresponding to java.You can do this at any time even when a pop up is popping up.
If your still using explorer than its view then internet options then advanced scroll down and uncheck the boxes corresponding to java.Then try Netscape