Minimalistic backbone-like Javascript events for light usage.

events.js

function implementEvents() {

	this._callbacks = {};
	this.on = function (eventName, func, t) {
		if (typeof func !== 'function')
			throw "Invalid argument to .on() "+func
		if (this._callbacks[eventName])
			this._callbacks[eventName].push(t?func.bind(t):func);
		else
			this._callbacks[eventName] = [t?func.bind(t):func];
	}
	this.trigger = function (eventName, args) {
		var funcs = this._callbacks[eventName];
		if (!funcs)
			return false;
		for (var i=0; i<funcs.length; i++) {
			funcs[i].apply(this, args); // Bind to this or entered object (arg 't' in this.on)
		}
		return i;
	}
}

// Usage:
var obj = new (function () {
	// ...
	implementEvents.bind(this)();
	// ...
})();

// then...
obj.on('change', this.change, this);
obj.on('change', obj.render);