var buy_islgoin = {
    islgoin: function() {
        if (buy_islgoin._getCookie("yoho") && buy_islgoin._getCookie("yoho").length > 4) {
            return true;
        }
        else {
            return false;
        }
    },
    _getCookie: function(sName) {
        var aCookie = document.cookie.split("; ");
        for (var i = 0; i < aCookie.length; i++) {
            var aCrumb = aCookie[i].split("=");
            if (sName == aCrumb[0])
                return aCookie[i].replace("yoho=", "");
        }
        return null;
    }
}