I have a website script that is supposed to render popunder pages. I've used the relevant JS codes like window.blur and window.focus. However, I'm still seeing the page rendered as a popup instead of a popunder. I checked on various sites and it looks like these scripts could have a problem. However, I still see popunders being delivered neatly on various pages. So the task is to help me fix this script so that I can show popunders instead of popups.