Exemplo de uma chamada ajax sem seletores de elementos entre as funlçoes ajax.

ajax

function Tour(el) {
  var tour = this;
  this.el = el;
  this.fetchPhotos = function() { 
    $.ajax('/photos.html', {
      data: {location: tour.el.data('location')},
      context: tour,
      success: function(response) {
        this.el.find('.photos').html(response).fadeIn();
      },
      error: function() {
        this.el.find('.photos').html('<li>There was a problem fetching the latest photos. Please try again.</li>');
      },
      timeout: 3000,
      beforeSend: function() {
        this.el.addClass('is-fetching');
      },
      complete: function() {
        this.el.removeClass('is-fetching');
      }
    });
  }
  this.el.on('click', 'button', this.fetchPhotos);
}
$(document).ready(function() { 
  var paris = new Tour($('#paris'));
});