Events,js

function Event() {
   var subscribers = [];
   
   this.subscribe = function(args) {
       for (var i=0; i < arguments.length; i++) {
           if (typeof(arguments[i]) === 'function'){
               subscribers.push(arguments[i]);
            }
        }
    };
    
    this.unsubscribe = function(args) {
        for (var i=0; i < arguments.length; i++) {
            if (typeof(arguments[i]) === 'function') {
                for (var y = subscribers.length; y > 0; --y) {
                    if (subscribers[y] === arguments[i]) {
                        subscribers.splice(y,1);
                        break;
                    }
                }
            }
        }
    };

    this.emit = function(args) {
        var that = this;
        var copy = [].slice.call(arguments);
        subscribers.forEach(function(subscriber){
            subscriber.apply(that, copy);
        });
    };
}