var list = $$('#NavMenu li a ');
list.each(function(element) {
 
	var fx = new Fx.Styles(element, {duration:300, wait:false});
 
	element.addEvent('mouseenter', function(){
		fx.start({
			
			'backgroundPosition': '0',
			color: '#fff'
		});
	});
 
	element.addEvent('mouseleave', function(){
		fx.start({
			
			'backgroundPosition': '200',
			color: '#767f85'
			
		});
		
	});
 
});