$(function(){
	var menu_offset = $('#header-down').width() - $('#menu').width();
	var menus = $('#menu > ul');
	var submenus = $('ul.submenu');
	var active_menu_id = $('.active-tab').parent().attr('menu-id');
	//var submenu_offset_top = $('#submenu').offset().top;
	//var start = $('#start');
	//var languages = $('#languages');
	
	function adjustSubmenu(){
		var submenu = $('.active-submenu');
		if(submenu.length > 0){
			var menu = menus.find('[menu-id="' + submenu.attr('menu') + '"]');
			var menu_center = (menu.width()/2) + menu.position().left + menu_offset;
			var diff = submenu.offset().left - submenu.position().left;
			submenu.offset({left: menu_center - (submenu.width()/2) + diff});
		}
	}
	
	adjustSubmenu();
	
	menus.children('li').hover(function(){
		if($(this).attr('menu-id') != active_menu_id){
			submenus.removeClass('active-submenu');
			$('ul.submenu[menu="' + $(this).attr('menu-id') + '"]').addClass('active-submenu');
			active_menu_id = $(this).attr('menu-id');
			$('#menu > ul > li > a').removeClass('active-tab');
			$(this).children('a').addClass('active-tab');
			adjustSubmenu();
		}
	});
	
});