This could be done by making the server check and set a cookie when a user visits.
If the cookie doesn't exist, it's the first time the user is visiting so show the "force refresh page". If the cookie exists, let the user in.
Doing this would be pointless and probably very irritating if you visit the site alot.
I think they do it to force all the ads on that to show more times per visitor, which I'd consider cheating if I was Google.
The script you mention would be located on your computer since 127.0.0.1 is the loopback address to your comp. If your comp is running some kind of server (webserver perhaps) which is listening on port 1025, it would execute the js.cgi file with the querystring "pa&r=12043". That looks very suspicious to me because whatever code is in that file would most likely run with full access to your system, and maybe without you knowing it. What is returned from the file will be interpreted as JavaScript by the browser, which could report back some data to the site by submitting a hidden form or something...