[jQuery] Save javascript variable via jquery

Hallo all.
I would like to save the response of an AJAX call in a variable
declared in the document ready in parent page.

Imagine this piece of code

http://pastie.org/727450

The document ready lives in an iframe so I would like to save in the
parent page the var myVariable, not to load it every time with a
server-side call.

Is there any way to inject in the parent the javascript variable?

Kind regards

Massimo