A small example of JS operating Cookies

Cookie = {
    setCookie: function (name, val) {
        var exp = new Date();
        exp.setDate(exp.getDate() + 600 * 1000);
        document.cookie = name + "=" + escape(val) + ";expires=" + exp.toGMTString();
    }, DelCookie: function (name) {
        document.cookie = name + "=;expires=" + (new Date(0)).toGMTString();
    }, getCookie: function (name) {
        var cookieArray = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
        if (cookieArray != null) return unescape(cookieArray[2]);
        else return null;
    } 
}