function setCookie(sName, sValue, oExpires, sPath, sDomain, bSecure) {
    var sCookie = sName + "=" + encodeURIComponent(sValue);
    if (oExpires) sCookie += "; expires=" + oExpires.toGMTString();
    if (sPath) sCookie += "; path=" + sPath;
    if (sDomain) sCookie += "; domain=" + sDomain;
    if (bSecure) sCookie += "; secure";
    document.cookie = sCookie;
}

function getCookie(sName) {
    var sRE = "(?:; )?" + sName + "=([^;]*);?";
    var oRE = new RegExp(sRE);
    if (oRE.test(document.cookie)) {
        return decodeURIComponent(RegExp["$1"]);
    } else {
        return null;
    }
}

function deleteCookie(sName, sPath, sDomain) {
    setCookie(sName, "", new Date(0), sPath, sDomain);
}