[MovedGoalPosts]

I suspect there will be something that can be retuned in IE's security settings (tools > Internet Options), but don't know what.

XP SP2, turns on high security settings by default. You might need to add the website into trusded zones, or allow scripts or controls to run automatically.

Of course now that M$ can't supply java as part of IE or windows, anything using javascript seems to cause problems for many users simply cos the default PC might not be able to run it without them knowing where to go and download java stuff.