function menu (menu) {
	
	this.element = menu;
	this.active = null;
	
	var menuman = this;
		
	this.focusOn = function (elemo) {
		
		if (this.active) this.active.removeClassName('active');
		this.active = elemo;
		if (!elemo) return;
		elemo.addClassName('active');
	}
	
	function onhover () {
		
		if (!menuman.active) return;
		menuman.focusOn(this);
	}
	
	function onclick (e) {
		
		e.stopPropagation();
		var hello = this;
		if (this.hasClassName('active')) hello = null;
		menuman.focusOn(hello);
	}
	
	function docOnclick () {
		
		menuman.focusOn(null);
	}
	
	
	var elem = menu.getChildElementsByTagName('li');
	for (var u = 0; u < elem.length; u++) {
		elem[u].addEventListener('click', onclick, false);
		elem[u].addEventListener('mouseover', onhover, false);
	}
	
	document.addEventListener('click', docOnclick, false);
}