var currentMenu = '';
var currentSubMenu = 'subMenuNull';
var currentSelectedSubMenu = 'subMenuNull';

function changeMenu(menuId,menuItemId) {
	var menuElts = document.getElementsByName(menuId);
	for (i=0; i<menuElts.length; i++) {
		menuElts[i].style.fontStyle = "normal";
	}
		var menuItemElt = document.getElementById(menuItemId);
		menuItemElt.style.fontStyle = "italic";
		currentMenu = menuItemId;

}

function showSubMenu(subMenuId) {
	var show = document.getElementById(subMenuId);
    show.style.display = "block";
	if (currentSubMenu != subMenuId) {
		var hide = document.getElementById(currentSubMenu);
		hide.style.display = "none";
		currentSubMenu = subMenuId;
	}
}
function hideSubMenu() {
	var hide = document.getElementById(currentSubMenu);
    hide.style.display = "none";
}
function changeSubMenu(subMenuId,SubMenuItemId) {
	var subMenuElts = document.getElementsByName(subMenuId);
	for (i=0; i<subMenuElts.length; i++) {
		subMenuElts[i].style.fontStyle = "normal";
	}
		var subMenuItemElt = document.getElementById(SubMenuItemId);
		subMenuItemElt.style.fontStyle = "italic";
		currentSelectedSubMenu = SubMenuItemId;

}