// BRS Drop Menu (12.14.09)
// Copyright Blue Ridge Solutions, Inc.  www.blueridges.com

// INSTRUCTIONS
// The menu container must have a clase of main_menu
// All main items must have a class of menu_item and be assigned an id of choice. (ex. <a class="menu_item" id="nav_main">)
// All drop menu containers must have a class of drop_menu and be assigned the same id as the main item id prepended with sub_.  (ex. <div class="drop_menu" id="sub_nav_main">)
// Not all main menu items require a drop menu

// Setup Variables
var theSpeed = 200; // animation speed for showing menus [300]
var closeDropMenuDelay = 4500; // delay to close the current open menu after
// the mouse leaves it [400]
var openDropMenuDelay = 200; // delay to open the drop menu after the mouse
// goes over the main menu item [200]

var dropMenuActive = ''; // the currently active drop menu
var dropMenuRequested = '';

function onOverMenu() {
	var itemId = $(this).attr('id');
	var targetId = "sub_" + itemId;
	
	// stop any pending events for this menu item
	var theTimer = $(this).attr('timerid');
	if (theTimer) {
		clearTimeout(theTimer);
	}

	// request this submenu to open
	dropMenuRequested = targetId;
	$(this).attr('timerid', setTimeout(updateMenus, openDropMenuDelay));
}

function onOutMenu() {
	// stop any pending events for this menu item
	dropMenuRequested = '';
	var theTimer = $(this).attr('timerid');

	if (theTimer) {
		clearTimeout(theTimer);
	}

	// schedule to close the presently active sub menu
	$(this).attr('timerid', setTimeout(updateMenus, closeDropMenuDelay));
}

function onOverDropMenu() {
	var targetId = $(this).attr('id');
	
	// override the menu requested to the sub menu entered
	dropMenuRequested = targetId;
}

function onOutDropMenu() {
	// the submenu has been exited, start the timer to close the sub menu
	dropMenuRequested = '';

	var theTimer = $(this).attr('timerid');
	if (theTimer) {
		clearTimeout(theTimer);
	}

	// schedule to close the presently active sub menu
	$(this).attr('timerid', setTimeout(updateMenus, closeDropMenuDelay));
}

// called via timeout to control the sub menu display
function updateMenus() {
	
	if (dropMenuActive == dropMenuRequested)
		return; // don't do anything if the menu to display is current
	dropMenuActive = dropMenuRequested;
	
	// show the requested menu
	if (dropMenuActive != '') {
		$('#' + dropMenuActive).addClass('active').stop(true, true).slideDown(theSpeed);
		menuMarker = dropMenuActive.replace('sub_', '');
		$('#' + menuMarker).addClass('marker');
	}
	
	// hide all others
	$('.drop_menu').each(
	function(i) {
		if ($(this).hasClass('active')
				&& $(this).attr('id') != dropMenuActive) {
			$(this).removeClass('active').stop(true, true).slideUp(theSpeed);
		}
		if ($(this).attr('id') != dropMenuActive) {
			$('.marker').removeClass('marker');
		}
	});
}

/* Turn off
$(function() {
	$('.drop_menu').hide();
	$('.main_menu').children('.menu_item').hover(onOverMenu, onOutMenu);
	$('.drop_menu').hover(onOverDropMenu, onOutDropMenu);
	$('.main_menu').children('.menu_item').click(function(e) {
		if ($(e.target).attr('href') == '#')
			e.preventDefault();
	});
});
*/