var Cookie = {
data: {},
options: {expires: 1, domain: "", path: "", secure: false},

init: function(options, data) {
Cookie.options = Object.extend(Cookie.options, options || {});

var payload = Cookie.retrieve();
if(payload) {
Cookie.data = payload.evalJSON();
}
else {
Cookie.data = data || {};
}
Cookie.store();
},
getData: function(key) {
return Cookie.data[key];
},
setData: function(key, value) {
Cookie.data[key] = value;
Cookie.store();
},
removeData: function(key) {
delete Cookie.data[key];
Cookie.store();
},
retrieve: function() {
var start = document.cookie.indexOf(Cookie.options.name + "=");

if(start == -1) {
return null;
}
if(Cookie.options.name != document.cookie.substr(start, Cookie.options.name.length)) {
return null;
}

var len = start + Cookie.options.name.length + 1;   
var end = document.cookie.indexOf(';', len);

if(end == -1) {
end = document.cookie.length;
} 
return unescape(document.cookie.substring(len, end));
},
store: function() {
var expires = '';

if (Cookie.options.expires) {
var today = new Date();
expires = Cookie.options.expires * 86400000;
expires = ';expires=' + new Date(today.getTime() + expires);
}

document.cookie = Cookie.options.name + '=' + escape(Object.toJSON(Cookie.data)) + Cookie.getOptions() + expires;
},
erase: function() {
document.cookie = Cookie.options.name + '=' + Cookie.getOptions() + ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
},
getOptions: function() {
return (Cookie.options.path ? ';path=' + Cookie.options.path : '') + (Cookie.options.domain ? ';domain=' + Cookie.options.domain : '') + (Cookie.options.secure ? ';secure' : '');      
}
};