var Kates = {
	nav: {
		initialize: function() {
			$$('li.main_nav_item').each(function(nav_el) {
				var section_name = nav_el.id.replace(/^nav_/, '');
				var main_nav_image = nav_el.select('.main_nav_image').first();
				nav_el.observe('mouseover', function() { 
					$(section_name + '_submenu').show();	
					Intersect.images.hover(main_nav_image);
				});
				nav_el.observe('mouseout', function() { 
					$(section_name + '_submenu').hide();
					Intersect.images.deactivate(main_nav_image);
				});
			});
		}
	}
}

Event.observe(window, 'load', function() {
	Kates.nav.initialize();
});