Simplified event dispatcher for in browser javascript.

AbstractEventsDispatcher.js

/**
 * Ex: 
 * 
 * Object = function () {}
 * Object.prototype = new AbstractEventsDispatcher;
 * 
 * Object.trigger("event", arguments);
 */

var AbstractEventsDispatcher = function () {
    
};
        
AbstractEventsDispatcher.prototype = {
    callbacks: {},
    global_callbacks: [],

    bind: function (event_name, callback) {
        this.callbacks[event_name] = this.callbacks[event_name] || [];
        this.callbacks[event_name].push(callback);
        return this;// chainable
    },

    trigger: function () {
        var args = Array.slice(arguments);

        this.dispatch.apply(this, args);
        this.dispatch_global.apply(this, args);
        return this;
    },

    bind_all: function (callback) {
        this.global_callbacks.push(callback);
        return this;
    },

    bind_all_except: function (except, handler) {
        this.bind_all(function (event_name, event_data) {
            if (except.indexOf(event_name) > -1) return false;
            handler(event_name, event_data)
        });
        return this
    },

    dispatch: function () {
        var event_name = arguments[0];
        var args = Array.slice(arguments);
        args.shift();
        var chain = this.callbacks[event_name];
        if (typeof chain == 'undefined') return; // no callbacks for this event
        for (var i = 0; i < chain.length; i++) {
            chain[i].apply(this, args);
        }
    },

    dispatch_global: function () {
        var args = Array.slice(arguments);
        args.shift();
        for (var i = 0; i < this.global_callbacks.length; i++) {
            this.global_callbacks[i].apply(this, args);
        }
    }
};