prev_list = null;
list_over = false;
list_timer = null;

function display_nav(el) {
	var lists = el.getElementsByTagName("ul");
	
	//hide previous item
	if (prev_list != null)
		prev_list.className = "";
	
	if (lists.length > 0) {
		var list = lists[0];
		
		set_list_over(true);
		list.className = "show";
		
		prev_list = list;
		hide_nav();
	}
}

function hide_nav() {
	window.clearTimeout(list_timer);
	
	if (!list_over) {
		prev_list.className = "";
	} else {
		list_timer = window.setTimeout(function() { hide_nav(); }, 500);
	}
}

function set_list_over(over) {
	list_over = over;
}

function show_sendfriend() {
	$("send_friend").style.display = "block";
	return false;
}

function hide_sendfriend() {
	$("send_friend").style.display = "none";
}