function Timer(intervalValue){
	this.intervalValue = intervalValue ? intervalValue : 500;
	this.interval = null;
	this.events = [];
	this.listeners = [];
	this.onstart = new DOMEvent();
	this.onstop = new DOMEvent();
	this.isTicking = false;
}
Timer.prototype.start = function(){
	this.calls = 0;
	this.timeElapsed = 0;
	this.interval = setInterval(
		this.intervalFunction.bind(this),
		this.intervalValue
	);
	this.isTicking = true;
	this.onstart.fire();
}
Timer.prototype.intervalFunction = function(){
	this.calls ++;
	this.timeElapsed += this.intervalValue;
	this.events.each(function(ev, index){
		var ret = ev.func.apply(ev.oThis, ev.args);
		if(typeof ret != 'undefined' && ret === true){
			this.listeners.each(function(lnr, index){
				if(lnr.name == ev.name){
					lnr.func.apply(lnr.oThis, [ret])
				}
			})
		}
	}.bind(this))
}
Timer.prototype.registerEvent = function(obj){
	this.events.push(obj);
}
Timer.prototype.registerEventListener = function(obj){
	this.listeners.push(obj);
}
Timer.prototype.clear = function(){
	clearInterval(this.interval);
	this.isTicking = false;
	this.onstop.fire();
}
Timer.prototype.toggle = function(){
	if(this.isTicking){
		this.clear();
	}else{
		this.start();
	}
}
Timer.prototype.restart = function(){
	this.clear();
	this.start();
}