var nMax = 2007;
var ckName = "choco=";
function exMenu(id) {
	var tr = document.getElementById(id).style;
	tr.display = (tr.display == "none") ? "block" : "none";
}

function exAll(a) {
	var md = (a) ? "block" : "none";
	for(var i=1998; i<=nMax; i++) {
		document.getElementById("n"+i).style.display = md;
	}
}

function mnSave() {
	var d = ckName;
	for(i=1998; i<=nMax; i++) {
		d += (document.getElementById("n"+i).style.display == "none") ? "0" : "1";
	}
	document.cookie = d + ";expires=Tue, 1-Jan-2030 00:00:00 GMT;";
}

function mnLoad() {
	var ck = document.cookie+";";
	var s = ck.indexOf(ckName);
	if (s >= 0) {
		var e = ck.indexOf(";",s);
		var d = ck.substring(s+ckName.length,e);
		var m = "none";
		for(var i=1998; i<=nMax; i++) {
			document.getElementById("n"+i).style.display = (d.charAt(i-1998) == "1") ? "block" : "none";
		}
	} else {
		exAll(0);
		document.getElementById("n" + nMax).style.display = "block";
	}
}

function init() {
	mnLoad();
}

window.onunload = mnSave;
window.onload = init;