Um, dude . . . you have scumware on your machine. The scumware more than likely scans this site for some key word (neo geo for example) and then does a search in a pop-up window.
I suggest downloading the free (and awesome) program Ad-Aware. It will scan your machine and allow you to destroy all scumware cookies and reg edits, etc. Be sure and run the update as well.
Just do search for Ad-Aware or Lavasoft (the programers).