cookie and subcookie utilty in javascript

//cookie util

 var CookieUtil = {

        get: function (name) {
            var cookieName = encodeURIComponent(name) + "=",
                 cookieStart = document.cookie.indexOf(cookieName),
                 cookieValue = null;

            if (cookieStart > -1) {
                var cookieEnd = document.cookie.indexOf(";", cookieStart);
                if (cookieEnd == -1) {
                    cookieEnd = document.cookie.length;
                }
                cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
            }
            return cookieValue;
        },

        set: function (name, value, expires, path, domain, secure) {
            var cookieText = encodeURIComponent(name) + "=" + encodeURIComponent(value);

            if (expires instanceof Date) {
                cookieText += "; expires=" + expires.toGMTString();
            }
            if (path) {
                cookieText += "; path=" + path;
            }
            if (domain) {
                cookieText += "; domain=" + domain;
            }
            if (secure) {
                cookieText += "; secure";
            }
            document.cookie = cookieText;
        },

        unset: function (name, path, domain, secure) {
            this.set(name, "", new Date(0), path, domain, secure);
        }
    };

//subcookie util

var SubCookieUtil = {

        get: function (name, subName) {
            var subCookies = this.getAll(name);
            if (subCookies) {
                return subCookies[subName];
            } else {
                return null;
            }
        },

        getAll: function (name) {
            var cookieName = encodeURIComponent(name) + "=",
                cookieStart = document.cookie.indexOf(cookieName),
                cookieValue = null,
                result = {};

            if (cookieStart > -1) {
                var cookieEnd = document.cookie.indexOf(";", cookieStart);
                if (cookieEnd == -1) {
                    cookieEnd = document.cookie.length;
                }
                cookieValue = document.cookie.substring(cookieStart + cookieName.length, cookieEnd);

                if (cookieValue.length > 0) {
                    var subCookies = cookieValue.split("&");

                    for (var i = 0, len = subCookies.length; i < len; i++) {
                        var parts = subCookies[i].split("=");
                        result[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
                    }
                    return result;
                }
            }
            return null;
        },

        set: function (name, subName, value, expires, path, domain, secure) {
            var subcookies = this.getAll(name) || {};
            subcookies[subName] = value;
            this.setAll(name, subcookies, expires, path, domain, secure);
        },

        setAll: function (name, subcookies, expires, path, domain, secure) {

            var cookieText = encodeURIComponent(name) + "=";
            var subcookieParts = new Array();

            for (var subName in subcookies) {
                if (subName.length > 0 && subcookies.hasOwnProperty(subName)) {
                    subcookieParts.push(encodeURIComponent(subName) + "=" + encodeURIComponent(subcookies[subName]));
                }
            }

            if (subcookieParts.length > 0) {
                cookieText += subcookieParts.join("&");

                if (expires instanceof Date) {
                    cookieText += "; expires=" + expires.toGMTString();
                }

                if (path) {
                    cookieText += "; path=" + path;
                }

                if (domain) {
                    cookieText += ";domain=" + domain;
                }

                if (secure) {
                    cookieText += ";secure";
                }
            } else {
                cookieText += "; expires=" + (new Date(0)).toGMTString();
            }
            document.cookie = cookieText;
        },

        unset: function (name, subName, path, domain, secure) {
            var subcookies = this.getAll(name);
            if (subcookies) {
                delete subcookies[subName];
                this.setAll(name, subcookies, null, path, domain, secure);
            }
        },

        unsetAll: function (name, path, domain, secure) {
            this.setAll(name, null, new Date(0), path, domain, secure);
        }
    };