[jQuery] Google maps v3 in tabs Problem

I try to embed a Google Map v3 in a tab.
In the HEAD of the tab html I put the <META> and <SCRIPT> tags needed
for the map.
When it loads in Firefox creates a completely new page with no body
and error messages: '$ is not defined' and 'm.google.maps is not
defined'
This happens even if I do not initialize the map.
In IE it does not has a problem if I don't initialize but if I do
gives me an two errors 'google = undefined' and 'some object does not
suport some method'

The same google code works fine in the page loaded individually (not
as a tab)

I would appreciate any help or ideas.
Thanks