A pop under problem

[tvrbob]

When I first launch IE a pop under appears and when I try to open it the window jumps to the top left corner and I can't see it. The site will close OK but I'm concerned that this may be spyware or some other sinister program. ZA and AVG don't stop it.

This is the site

http://a.as-eu.falkag.net/dat/dlv/aslframe.html?dat=205559&xl=0&yl=0&wrd=&prf=

Anyone know what it is and how I could kill it off?