function toggleTodoList() {
	if (document.getElementById('todoListContent').style.display == "none"){
		document.getElementById('todoListContent').style.display = "block";
		SetCookie('showToDo',"block",0);
	} else {
		document.getElementById('todoListContent').style.display = "none";
		SetCookie('showToDo',"none",0);
	}
}
function SetCookie(cookieName,cookieValue,nDays) {
	 var today = new Date();
	 var expire = new Date();
	 if (nDays==null || nDays==0) nDays=1;
	 expire.setTime(today.getTime() + 3600000*24*nDays);
	 document.cookie = cookieName+"="+escape(cookieValue)
	                 + ";expires="+expire.toGMTString();
}

function ReadCookie(cookieName) {
	 var theCookie=""+document.cookie;
	 var ind=theCookie.indexOf(cookieName);
	 if (ind==-1 || cookieName=="") return ""; 
	 var ind1=theCookie.indexOf(';',ind);
	 if (ind1==-1) ind1=theCookie.length; 
	 return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}

function setDefault() {
	var showToDo = ReadCookie('showToDo');
	if (showToDo == "") {
		showToDo = "none";
	}
	document.getElementById('todoListContent').style.display = showToDo;
}

if (window.addEventListener) {
	window.addEventListener("load", setDefault, false) //invoke function
}
if (window.attachEvent) {
	window.attachEvent("onload", setDefault)
}