Simple proxy and event listener

ProxyEventer.js

MyObject.prototype.on = function (eventName, callback) {
	if (this.eventListeners[eventName] == undefined) {
		this.eventListeners[eventName] = [];
	}
	if (typeof callback == "function") {
		this.eventListeners[eventName].push(callback);		
	} else {
		throw "can not subscribe with a non function callback";
	}
}

MyObject.prototype.publishEvent = function (eventName, data) {
	if (this.eventListeners[eventName] != undefined) {
		for (var i = 0; i < this.eventListeners[eventName].length; i++) {
			this.eventListeners[eventName][i](data);
		}
	}
}

MyObject.prototype.proxy = function () {
	var self = this;
	var proxyArgs = [];

	//arguments isnt actually an array.
	for (var i = 0; i < arguments.length; i++) {
	    proxyArgs[i] = arguments[i];
	}

	var functionName = proxyArgs.splice(0, 1)[0];

	var func = function() {
		var funcArgs = [];
		for (var i = 0; i < arguments.length; i++) {
		    funcArgs[i] = arguments[i];
		}
		var allArgs = proxyArgs.concat(funcArgs);

		self[functionName].apply(self, allArgs);
	}

	return func;
}