Event.observe(window, 'load', function(evt){
	//register links
	$$('a').each(function(el){
		el.observe('mouseover', function(){
			var rel = el.readAttribute('rel');
			$(rel).addClassName('hover');		
		});
		el.observe('mouseout', function(){
			var rel = el.readAttribute('rel');
			$(rel).removeClassName('hover');		
		});

	//loop
	});
//event
});