Such messages can come from many sources.
Common script errors messages can be eliminated by Clicking:
Menu: Tools - Internet Options - Advanced tab.
Check "Disable script debugging"
Uncheck "Display a notification about every script error"
Rule out parasites.
Dealing with Unwanted Spyware, Parasites, Toolbars and Search Engines
http://mvps.org/winhelp2002/unwanted.htm
Wujie Li said:
Hi, my box with widows XP. Recently there is an error that often appears
when I open some web links. It says "run time error, if not debug it ?
line: xxx error: syntax error". What happened with my system? I had shut
off script debug option in internet option, but the error appeared again.
Help me! Thank u in advance!