Get rid of the script,
http://www.squid-cache.org/mail-archive/squid-users/200301/1333.html
It appears to be some sort of proxy redirect.
Make a copy of your index.htm, call it indextest.htm, take the script out and re post it.
I have to run out for a bit but if you do that I'll check the test file to see if it eliminates the problem.
Scott
Scott