[jQuery] How to access a JavaScript object from within an ajax call?

[Joe]

I am trying to access my own JS object from within an ajax call, and
can't figure out how to get it to work.   Whenever I access "this" in
the function, it returns the ajax context and not my JS object
context.  My code looks something like this.  I have a Zone object
defined in a JS file like this:

//====================START CODE================
function Zone(data){
   this.someInfo = data;
   this.load = Zone_Load;
}

function Zone_Load(){
        $.ajax({
           type: "GET",
           url: "http://localhost/foo.xml";,
                success: requestSuccess
         });
}

function requestSuccess(data){
  this.someInfo = $(data).find('type');
}
//====================ENDCODE================

I am having problems with the last line.  How do i get access to the
JS object, so that i can set some info on it, based on the ajax call?

Any help would be appreciated?

thx,

Joe C