blogspot showing popups on blogs related to celebs and having adsense on them

i have noticed it for past month on my blogs(links in siggy)
i searched for it in my source but could not track ilead.itrack(these pop ups are shown) canany one tell me whats happening

here are few blogs where i saw pop ups
http://spicyhotgirls.blogspot.com/
http://masala-masti.blogspot.com/

thees are not mine
http://desimodels.blogspot.com/
http://celebsworld4u.blogspot.com/

i didnt find pop ups on any other blogs and content

 

I actually can't see any pop-ups on those sites, but anyway it isn't against the AdSense TOS to display pop-ups on a site with AdSense.

The rules are:
- Pop-ups must not interfere with the navigation of the site.
- AdSense ads must not be displayed within a pop-up.

 

Scan your computer for Spy- and Adwares !

 

thanks for the infos

i have nav intalled on my comp

but from where did those pop ups came