setCookie = function(name, value, expires, path, domain, secure) {
    var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
    document.cookie = curCookie;
}

getCookie = function(name) {
    var value = null;
    var start = document.cookie.indexOf(name + "=");
    if (start != -1) {
        var valueStart = start + name.length + 1;
        var valueEnd = document.cookie.indexOf(";", valueStart);
        if (valueEnd == -1) {
            valueEnd = document.cookie.length;
        }
        value = unescape(document.cookie.substring(valueStart, valueEnd));
    }
    return value;
}

deleteCookie = function(cookieName, cookieValue) {
    var expires = "Thu, 01-Jan-70 00:00:01 GMT;";
    document.cookie = cookieName + "=" + escape(cookieValue) + "; expires=" + expires;
}