function setCookie(name, value, expires, path, domain, secure) {

    document.cookie = name + '=' + escape (value)

                    + ((expires) ? '; expires=' + expires.toGMTString() : '')

                    + ((path)    ? '; path='    + path                  : '')

                    + ((domain)  ? '; domain='  + domain                : '')

                    + ((secure)  ? '; secure'                           : '');

}

function getCookieVal(offset) {

    var endstr = document.cookie.indexOf (';', offset);

    if (endstr == -1)

        endstr = document.cookie.length;

    return unescape(document.cookie.substring(offset, endstr));

}

function getCookie(name) {

    var arg = name + '=';

    var alen = arg.length;

    var clen = document.cookie.length;

    var i = 0;

    while (i < clen) {

        var j = i + alen;

        if (document.cookie.substring(i, j) == arg)

            return getCookieVal(j);

        i = document.cookie.indexOf(' ', i) + 1;

        if (i == 0) break;

    }

    return null;

}