var isNetscape	= (document.layers);
var isOpera	= (document.getElementById);
var isIE	= (document.all);
var GodiStyle;
var HistoryStyle;
var OnlineStyle;
var GodiVisible = 0;
var HistoryVisible = 0;
var OnlineVisible = 0;

function InitMenu()
{
	if (isNetscape)
	{
		GodiStyle = document.godi_menu;
		HistoryStyle = document.history_menu;
		OnlineStyle = document.online_menu;
	}
	else if (isOpera)
	{
		GodiStyle = document.getElementById("godi_menu").style;
		HistoryStyle = document.getElementById("history_menu").style;
		OnlineStyle = document.getElementById("online_menu").style;
	}
	else if (isIE)
	{
		GodiStyle = godi_menu.style;
		HistoryStyle = history_menu.style;
		OnlineStyle = online_menu.style;
	}
}

function ShowMenu(MenuName)
{
	if (MenuName == "godi")
	{
        GodiStyle.visibility='visible';
		GodiVisible	=	1;
		HistoryStyle.visibility='hidden';
		HistoryVisible	=	0;
		OnlineStyle.visibility='hidden';
		OnlineVisible	=	0;
	}
	else if(MenuName == "history")
	{
		GodiStyle.visibility='hidden';
		GodiVisible	=	0;
		HistoryStyle.visibility='visible';
		HistoryVisible	=	1;
		OnlineStyle.visibility='hidden';
		OnlineVisible	=	0;
	}
	else
	{
		GodiStyle.visibility='hidden';
		GodiVisible	=	0;
		HistoryStyle.visibility='hidden';
		HistoryVisible	=	0;
		OnlineStyle.visibility='visible';
		OnlineVisible	=	1;
	}
}

function HideMenus()
{
	if (HistoryVisible != 2)
	{
		HistoryStyle.visibility='hidden';
		HistoryVisible	=	0;
	}
	if (GodiVisible != 2)
	{
		GodiStyle.visibility='hidden';
		GodiVisible	=	0;
	}
	if (OnlineVisible != 2)
	{
		OnlineStyle.visibility='hidden';
		OnlineVisible	=	0;
	}
}
function PreserveMenu(MenuName)
{
	if (MenuName == "godi")
	{
		GodiVisible	=	2;
	}
	else if(MenuName == "history")
	{
		HistoryVisible	=	2;
	}
	else
	{
		OnlineVisible	=	2;
	}
}