How to put all of the javascript loaded through ajax or jquery.load in a non-global child scope

I'm trying to get around iframe by using ajax/jquery.load() and inject a third party page on my site (CORS requirements are not a issues here as the third party sets the appropriate CORS response headers).

So my question is: Let's say that the main host site loads jquery 1.x and a bunch of other libs. And let's say that the third party page loads jquery 2.x and some other conflicting libraries with the main site.

How can I refactor my JS on the third party page so that it's not loadedin JS global scope but in a shielded child scope.

Can I wrap everything in function(){}?? Including the jquery libs etc? If so how do I access the methods/vars in this child scope on the third party page?

Let me know if I need to provide any more details...