Events.js

jsx.require([jsx.base + '.Events'], function(){
  jsx.Events.__observe = jsx.Events.observe;
  
  jsx.Events.observe = function(element, name, observer, useCapture, observe){
    observe = (typeof(observe) == 'undefined' ? true : observe);
    return new jsx.Events.observer(element, name, observer, useCapture, observe);
  };
  
  jsx.Events.observer = function (element, name, observer, useCapture, observe){
    this.element = element;
    this.name = name;
    this.observer = observer;
    this.useCapture = useCapture;
    (observe ? this.start() : this.stop());
  
  };
  
  jsx.Events.observer.prototype = new function(){
    this.stop = function(){
      if (typeof this.observe != 'undefined' && !this.observe){
        return;
      }
      jsx.Events.stopObserving(this.element, this.name, this.observer, this.useCapture);
      this.observe = false;
    };
    this.start = function(){
      if (typeof this.observe != 'undefined' && this.observe){
        return;
      }
      jsx.Events.__observe(this.element, this.name, this.observer, this.useCapture);
      this.observe = true;
    };
    return this;
  };
  
  jsx.Events.unloadObserver = function(observer){
    observer.element = null;
    observer.observer = null;
  };
  
  jsx.Events.stop = function(event){
    jsx.Events.preventDefault(event);
    jsx.Events.stopPropagation(event);  
  };
  
  jsx.Events.preventDefault = function(event){
    if (event.preventDefault) {
      event.preventDefault();
    } else {
      event.returnValue = false;
    }
  };
  
  jsx.Events.stopPropagation = function(event){
    if (event.preventDefault) {
      event.stopPropagation();
    } else {
      event.cancelBubble = true;
    }
  };
  jsx.loaded('Events');
});