[Octane]

В интернете море информации по работе с cookies…

var cookie = {
	set: function(cookie_name, cookie_value, cookie_expire) {
			var expire_date = new Date;
			expire_date.setDate(expire_date.getDate() + cookie_expire);
			document.cookie = cookie_name + "=" + escape(cookie_value) + (cookie_expire == null ? "" : ";expires=" + expire_date.toGMTString());
	},
	get: function(cookie_name) {
			var cookie = document.cookie, length = cookie.length;
			if(length) {
					var cookie_start = cookie.indexOf(cookie_name + "=");
					if(cookie_start != -1) {
							var cookie_end = cookie.indexOf(";", cookie_start);
							if(cookie_end == -1) {
									cookie_end = length;
							}
							cookie_start += cookie_name.length + 1;
							return unescape(cookie.substring(cookie_start, cookie_end));
					}
			}
			return null;
	},
	erase: function(cookie_name) {
			core.cookies.set(cookie_name, "", -1);
	}
};


cookie.set("test", "O_o");

alert(cookie.get("test"));