var element = 0;
var old = Object;

function setActive (obj) {
	obj.className = 'menu-on';
	return;
}

function unsetActive (obj) {
	obj.className = 'menu';
	return;
}

function setActivee (obj) {
	obj.parentNode.className = 'menu-on';
	return;
}

function unsetActivee (obj) {
	obj.parentNode.className = 'menu';
	return;
}

function openBlock (obj, id) {
	if (id == element) {
		if (document.getElementById('block-'+element).style.display == 'none') {
			document.getElementById('block-'+element).style.display = 'block';
		} else {
			document.getElementById('block-'+element).style.display = 'none';
		}
		return;
	}
	document.getElementById('block-'+element).style.display = 'none';
	document.getElementById('block-'+id).style.display = 'block';
	
	old.className = 'chron-link';
	obj.className = 'chron-link-act';
	
	element = id;
	old = obj;
	return;
}