function changeDiv(a) {
	var c = document.getElementById("acitveDiv");
	document.getElementById(c.value).style.display = 'none';
	document.getElementById(c.value+'LI').className = 'off';
	document.getElementById(a).style.display = 'block';
	document.getElementById(a+'LI').className = 'on';
	c.value = a;
}