Edit in JSFiddle

// This is our custom object.
var jungle = {
   animals: 0
};

// This method will increment a jungle's object animal count.
var addAnimal = function(event) {
   var j = event.target;
   j.animals = j.animals + 1;
};

// Watch the jungle; if you see any animal events, addAnimal().
$(jungle).bind('monkey', addAnimal);
$(jungle).bind('bear', addAnimal);
 
$(function() {
    // Now fire some jungle events:
    $(jungle).trigger('monkey');
    $(jungle).trigger('banana');
    $(jungle).trigger('bear');
    $(jungle).trigger('MONKEY');
    
    // Now how many animals? 2.
    document.write(jungle.animals);
});