fun.js

var fun = (function() {
  var self = {};

  self.element = (function() {
    var self = {};

    self.events = (function() {
      // Based on http://dean.edwards.name/my/events.js.

      var self = {};

      function fix(event) {
        event.preventDefault = function() {
          this.returnValue = false;
        }
        event.stopPropagation = function() {
          this.cancelBubble = true;
        }
        return event;
      }

      function handle(event) {
        event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);

        var ret = true;
        for (var i in this.events[event.type]) {
          this.$$handle_event = handlers[i];
          if (this.$$handle_event(event) === false) {
            ret = false;
          }
        }

        return ret;
      }

      self.add = function(element, type, handler) {
        if (element.addEventListener) {
          element.addEventListener(type, handler, false);
        } else {
          if (!handler.$$guid) {
            handler.$$guid = self.add.guid++;
          }
          if (!element.events) {
            element.events = {};
          }
          var handlers = element.events[type];
          if (!handlers) {
            handlers = element.events[type] = {};
            if (element["on" + type]) {
              handlers[0] = element["on" + type];
            }
          }
          handlers[handler.$$guid] = handler;
          element["on" + type] = handle;
        }
      }
      self.add.guid = 1;

      self.remove = function(element, type, handler) {
        if (element.removeEventListener) {
          element.removeEventListener(type, handler, false);
        } else {
          if (element.events && element.events[type]) {
            delete element.events[type][handler.$$guid];
          }
        }
      }

      return self;
    })();

    return self;
  })();

  return self;
}());