$(document).ready(function(){
	
	// main navigation - rollover with "goback-to-currently-selected-ability"
	$('ul#main-navigation > li').hover(
		function(){	
			$('ul#main-navigation > li.active').toggleClass('active _active');
			$(this).addClass('hover');
		}, 
		function(){	
			$('ul#main-navigation > li._active').toggleClass('active _active');
			$(this).removeClass('hover');	
		}
	);	

});