Loading dynamic url using ajax .load?

How do I make a ajax call that will work with multiple urls?

I used jQuery ajax .load but the problem is the nextLink variable will not be updated since it is already loaded in the js file.

var url = "http://ift.tt/1EZWtsU"
var pageNum = 1;
var nextLink =url+pageNum;

 $('.content-'+ pageNum).load(nextLink + ' .each-block',
    function() {
        pageNum++;
    }
);