When I say convincing, I mean in the sense that it was convincing to me because I know nothing and he spoke with apparent authority.
Now that I've read what you have to say it makes complete sense.
I've also discovered that the code he provided throws an error on every page visible if viewed in FireFox with FireBug.
I will attempt to convince them of their error.
Can you suggest a host with 24x7 live tech?
Your obedient servent