$(document).ready(function(){
	var mainMenuItems = $('.main_menu li');
	var selectedItem = $('.main_menu li.selected_item');
	mainMenuItems.hover(function(){
		selectedItem.removeClass('selected_item');
	}, function(){
		selectedItem.addClass('selected_item');
	});

	$('.calendar .cal_item').hover(function(){
		$(this).addClass('selected');
	}, function(){
		$(this).removeClass('selected');
	});
});