function toggleMenu(menuItem, strState){
	var objMenu = document.getElementById(menuItem);
	if (strState == 'on'){
		objMenu.style.display = 'block';
	}else if (strState == 'off'){
		objMenu.style.display = 'none';
	}else{
		objMenu.style.display = (objMenu.style.display =='block') ? 'none' : 'block';
	}
}