function Cookie(document, name, hours, path, domain, secure)
{
	this.$document = document;
	this.$name = name;
	if (hours)
		this.$expiration = new Date((new Date()).getTime() + hours*3600000);
	else this.$expiration = null;
	if (path)
		this.$path = path;
	else
		this.$path = null;
	if (domain)
		this.$domain = domain;
	else
		this.$domain = null;
	if (secure)
		this.$secure = true;
	else
		this.$secure = false;
}

Cookie.prototype.store = function () {
	var cookieval = "";
	for(var prop in this) {
		//Ignore properties with names that begin with '$' and also methods
		if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function'))
			continue;
		if (cookieval != "") cookieval += '&';
		cookieval += prop + ':' + escape(this[prop]);
	}

var cookie = this.$name + '=' + cookieval;
if (this.$expiration)
	cookie += '; expires=' + this.$expiration.toGMTString();
if (this.$path) cookie += '; path=' + this.$path;
if (this.$domain) cookie += '; domain=' +this.$domain;
if (this.$secure) cookie += '; secure';

//Store the cookie by setting the Document.cookie property
this.$document.cookie = cookie;
}

Cookie.prototype.load = function() {
	var allcookies = this.$document.cookie;
	if (allcookies == "") return false;

	var start = allcookies.indexOf(this.$name + '=');
	if (start == -1) return false;
	start += this.$name.length + 1
	var end = allcookies.indexOf(';', start);
	if (end == -1) end = allcookies.length;
	var cookieval = allcookies.substring(start, end);

	var a = cookieval.split('&');
	for(var i=0; i < a.length; i++)
		a[i] = a[i].split(':');

	for(var i = 0; i < a.length; i++){
		this[a[i][0]] = unescape(a[i][1]);
	}

	return true;

}

Cookie.prototype.remove  = function() {
	var cookie;
	cookie = this.$name + '=';
	if (this.$path) cookie += '; path=' + this.$path;
	if (this.$domain) cookie += '; domain=' + this.$domain;
	cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';

	this.$document.cookie = cookie;

}

var visitordata = new Cookie(document, "test", 43800);

if (!visitordata.load() || !visitordata.city)
	visitordata.city = 'Des Moines';

function Update(){
	visitordata.city=document.cities.selectcity.value;
	visitordata.store();
	
	if (window.opener==null){
		var yourParentWin = window.dialogArguments;
		yourParentWin.history.go(0);
		window.close();
	}
	else{
		window.opener.location.reload();
	}
}