var AjaxRequest = Class.extend({

    init: function(url) {
        this.url = url;
    },

    process: function() {
        var response;

        $.get("http://framework.dev/ajax.php", function(data) {
            response = obj;
        });

        return response;
    }

});

$('#test').on('click', function() {
    var request = new AjaxRequest('ajax.php');

    console.log(request.process());
});