openedSubmenuID = -1;

function openMenu(menuID){
	if(openedSubmenuID >= 0){
		var objMenuSel = document.getElementById('submenu'+openedSubmenuID);
		objMenuSel.className = 'submenuHidden';
		objMenuSel = document.getElementById('mainbutton'+openedSubmenuID);
		objMenuSel.className = 'mainbutton';
	}
	openedSubmenuID = menuID;
	var objMenu = document.getElementById('submenu'+menuID);
	objMenu.className = 'submenuVisible';
	objMenu = document.getElementById('mainbutton'+menuID);
	objMenu.className = 'mainbuttonSelected';
}

function setOpenedMenu(menuID){
	openedSubmenuID = menuID;
}