var RealBopen;
    var bopen;

    function getCookie_RC(name){
        var re = new RegExp( "(\;|^)[^;]*(" + name + ")\=([^;]*)(;|$)" );
        var res = re.exec( document.cookie );
        return res != null ? res[3] : null;
    }

    var RealBCookie = getCookie_RC("RC_Bnr_sisain6");
    var RealBopen = "n";

    if(RealBCookie == "NaN" || RealBCookie == null) {
        RealBopen = "y";
    }

    document.write("<script language=JavaScript src='http://ade.realclick.co.kr/ad_headcopy/sisain6_bnr1.js?bopen="+RealBopen+"' charset='euc-kr'></script>");