gistfile1.js

jQuery.fn['fadeIn'] = function( speed, callback ){
  this.show();
  if (!!callback) { callback.call(); }
  return this;
};

jQuery.fn['fadeOut'] = function( speed, callback ){
  this.hide();
  if (!!callback) { callback.call(); }
  return this;
};

jQuery.fn['slideToggle'] = function( speed, callback ){
  this.toggle();
  if (!!callback) { callback.call(); }
  return this;
};

jQuery.fn['animate'] = function( properties, speed, easing, callback ){
  if (!!callback) { callback.call(); }
  return this
};