function toggleMenu(menuID){
	if(document.getElementById('sub_' + menuID).style.display == "none"){
		document.getElementById('item_' + menuID).className = "active";
		document.getElementById('sub_' + menuID).style.display = "block";
	}
	else{
		document.getElementById('item_' + menuID).className = "";
		document.getElementById('sub_' + menuID).style.display = "none";
	}
}