function gCk(nm) {
        var dc = document.cookie;
        var cn = nm + "=";
        var cL = dc.length;
        var cb = 0;
        while (cb < cL) {
                var vB = cb + cn.length;
                if (dc.substring(cb, vB) == cn) {
                        var vend = dc.indexOf (";", vB);
                        if (vend == -1) {vend = cL;}
                        return unescape(dc.substring(vB, vend));
                }
                cb = dc.indexOf(" ", cb) + 1;
                if (cb == 0) {break;}
        }
        return null;
}