[jQuery] How to access variables in page loaded with $.load?

[Matt Wilson]

I have a page /a that has a line

var aaa = 99;

And I load that page /a into a div on another page.  In the other
page, I want access to that variable aaa.  I tried this:

$("#adiv").load("/a", function () { console.log(aaa); })

I get an error that aaa is undefined.

What am I doing wrong?