$(document).ready(function() {
    main_nav_item_active = $("body").attr('class');
	main_nav_item_active = "#" + main_nav_item_active;
	$(main_nav_item_active).addClass('active');
	$(".main_nav_item a").mouseover(
		function(){
			if("#" + $(this).parent().parent().attr('id') != main_nav_item_active)
			{
				$(this).parent().parent().addClass('active');
			}
		}).mouseout(
		function() {
			if("#" + $(this).parent().parent().attr('id') != main_nav_item_active)
			{
				$(this).parent().parent().removeClass('active');
			}
		}
	);
});