Is this a virus?

Microsoft Windows 98

Have noticed, when online, this gets written into the:

a) header:

<<<script language='javascript'


b) below </html>

<script language='javascript'>postamble();</script>

Believe it is suspect and have also noticed:

- bgsound loops don't play
- script errors occur on page

Any advice on what it is and how to get rid of it would be most welcome.
Have tried:

- Hijack This
- BHODemon
- Cwshredder
- Cool Websearch Smartkiller
- Ad-Aware
- Spybot

Any suggestions would be most welcome. Many thanks.

Denis
Unclear description of the problem.

Does that happen on every web page you visit?

If it only happens when you go to one web page, it's
because the page has not been coded properly. There are
errors in the HTML that display code that should remain hidden.

If it happens on every web page you access, then it's a
different matter.

Try using the excellent Mozilla Firefox browser, which is a
small download from http://www.mozilla.org/ to find out if
it happens with that browser as well.

Eric,
http://www.pcbuyerbeware.co.uk/
http://www.sharedbirthday.co.uk/

most welcome.
Eric,

Thanks for this and my apologies for not being more specific:

- Affects all files viewed "online" with explorer
- Additional script absent when viewed "offline" with explorer
- Additional script absent when server viewed "offline" with FTP software
- All internet pages and not just my own affected when viewed "online" with
explorer
- No problem with Mozilla - thanks for suggestion (use it to access work
intranet, which am unable to access with ie [once Mozilla has extended its
scope - and especially the active X plug-in issue - it will be an excellent
browser])

This all seems to point to an ie6-related problem/virus?? It seems to be
using loopback in someway, but as I only have modest technical knowledge don
't know what the purpose of the script is? Any help with finding out what
it is and how to get rid of it would be most welcome. Many thanks for your
help.

Denis
.