function showSubMenu(menuItem, number, bgcolor)
{
	var menuID = "menu_div_id" + number;
	var menuSubItemId = "sub_div_id" + number;
	
	var subMenuItem = document.getElementById(menuSubItemId);
	var mainNavItem = document.getElementById(menuID);
	
	if(subMenuItem != null && subMenuItem != "undefined")
	{
		subMenuItem.style.display = "";
	}
	menuItem.style.backgroundColor = bgcolor;
}
function hideSubMenu(menuItem, number)
{
	var menuID = "menu_div_id" + number;
	var menuSubItemId = "sub_div_id" + number;
	
	var subMenuItem = document.getElementById(menuSubItemId);
	var mainNavItem = document.getElementById(menuID);
	
	if(subMenuItem != null && subMenuItem != "undefined")
	{
		subMenuItem.style.display = "none";
	}
	
	menuItem.style.backgroundColor = "";
}
function openMenuURL(URL) {
	window.location=URL;
}