I have an odd problem when I'm trying to use jquery. When I download it and reference it from my webpage it doesn't work. When I reference it from google it doesn't work. But when I put references to both google and the downloaded version it works. Please could somebody help. Maybe I'm being a bit stupid as I'm new at this. But it is doing my head in. Thanks.
It doesn't make much sense that it works only if you load both.
Only load ONE. Try, in turn, the CDN version and your local version, and check for errors.