function DOMEvent(){
	this.listeners = [];
}
DOMEvent.prototype.register = function(name, lnr, callslimit){
	if(this.hasNamedListener(name)){
		return;
	}
	var ev = {
		name: name,
		func: lnr,
		calls: 0,
		callslimit: callslimit ? callslimit : -1
	};
	this.listeners.insert(ev);
}
DOMEvent.prototype.remove = function(name){
	this.listeners.each(
		function(lnr, index){
			if(lnr.name == name){
				this.listeners.remove(index);
				throw $break;
			}
		}.bind(this)
	);	
}
DOMEvent.prototype.fire = function(){
	this.listeners.each(
		function(lnr){
			lnr.func();
			lnr.calls++;
			if(lnr.calls == lnr.callslimit){
				this.remove(lnr.name)
			}
		}.bind(this)
	)
}
DOMEvent.prototype.length = function(){
	return this.listeners.length;
}
DOMEvent.prototype.hasNamedListener = function(name){
	var ret = false;
	this.listeners.each(
		function(lnr){
			if(lnr.name == name){
				ret = true;
				throw $break;
			}
		}
	);
	return ret;
}