function switchMenu(obj) {
	var el = document.getElementById(obj);
	el.style.display = (el.style.display != 'none' ? 'none' : '' );
}

function switchOn(obj) {
	var el = document.getElementById(obj);
	el.style.display = '';
}

function switchOff(obj) {
	var el = document.getElementById(obj);
	el.style.display = 'none';
}