Problems with jquery functions

Question

I have a ajax function that calls an inner function on success. In this function, I can read, but not change Variables! How can I do this?

Answer 1

Could you please share your code? :)

Answer 2

Not on a pc, but this is as good as i could:
$ajax({
url:'x.com',
success:function(data){
//data has to get out of the ajax function
},
}) ;