JSON and JS Callback function
===

I'm having some problems understanding JS Callbacks in regards to getting and parsing JSON information.

What I'm trying to do is using this remote code to populate a select dropdown.

    setCategories({
    	"categories": ["Billing", "Gameplay", "Bugs", "Rules & Policies", "Technical Support"]
    });

This code here above is coming from a remote .js file, this is the howl content of the file. I cant link to the file at this point.

Now I'm using what I know to access the JSON information


    $.ajax({
    		  url: "http://web.ccpgamescdn.com/common/frontendtest/categories.js",
    		  dataType: 'jsonp',
    		  data: data,
    		  success: function(data, textStatus, jqxhr) {
    		     console.log(data); //data returned
    		     
    		  }
    		});

How ever this returns me this error message from the console 

> Uncaught ReferenceError: setCategories is not defined

I know how to parse a simple json file, but this JS Callback is beyond my knowledge and I'm not sure how to work with this.