//example using listeners
var element = $('example');
var fn1 = function(e) {//handle click
};
var fn2 = function(e) {// do other stuff with click
};
addEvent(element, 'click', fn1);
addEvent(element, 'click', fn2);// example using handlers
var element = document.getElementById('b');
var fn1 = function(e) {// handle click
};
var fn2 = function(e) {// do other stuff with click
};
element.onclick = fn1;
element.onclick = fn2; //fn1被覆盖了

// Publisher API
var Animation = function(o) {this.onStart = new Publisher,this.onComplete = new Publisher,this.onTween = new Publisher;
};
Animation.method('fly', function() {// begin animationthis.onStart.deliver();for ( ... ) { // loop through frames// deliver frame numberthis.onTween.deliver(i);}// end animationthis.onComplete.deliver();
});// setup an account with the animation manager
var Superman = new Animation({...config properties...});
// Begin implementing subscribers
var putOnCape = function(i) { };
var takeOffCape = function(i) { };
putOnCape.subscribe(Superman.onStart);
takeOffCape.subscribe(Superman.onComplete);
// fly can be called anywhere
Superman.fly();
// for instance:
addEvent(element, 'click', function() {Superman.fly();
});