var Cookies = {
    aliases: {},

    alias: function(alias, name, defaultValue) {
        Cookies.aliases[alias] = name;

        Cookies[alias] = function(value, days) {
            if (value == null)
                return Cookies.get(name, defaultValue);
            else
                Cookies.set(name, value, days);
        }
    },

    set: function(name, value, days) {
        name = Cookies.aliases[name] || name;

        var expires = '';

        if (!isNaN(days)) {
            var date = new Date();
            date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);
            expires = "; expires=" + date.toGMTString();
        }

        document.cookie = name + "=" + escape(value) + expires + "; path=/";
    },

    get: function(name, defaultValue) {
        name = Cookies.aliases[name] || name;

        var regex = new RegExp(name + "s*=s*(.*?)(;|$)");
        var cookies = document.cookie.toString();
        var match = cookies.match(regex);

        if (match)
            return unescape(match[1]);

        return defaultValue;
    },

    erase: function(name) {
        Cookies.set(name, '', -1);
    }
}