function gbk_convert(cc, mod){
    var str = '';
    var tmpidx;
    var convert_src;
    var convert_des;
    var convert_sp = '°Ӱհڰܰʱϱбұձ߱ƲβϲвѲҲӲԲղֲײ޲³ĳųƳͳϳҳճٳ۳ܳݳ´ǴʴʹϴдѴӴԴմڴܴƵ˵еӵݵ޵ߵĶƶͶ϶жҶӶԶֶٶ۶÷ķɷ̷Ϸѷ׷طܷ߷øƸǸɸϸѸӸԸոָٸڸ޸ƹ˹йع۹ݹ߹źҺ׺غƻѻӻԻٻ߻üƼǼʼ̼ͼмԼռּؼۼݼ߼½ýĽŽȽɽʽνϽս׽ڽܽǾɾԾپݾſǿοѿҿٿ¢£¤¥¦§¨«¬­®¯°±²³¸»¼½¿áèêíóôûþıĶšŢťŦŧŨũűŵŷŸŹŻŽƭƮƵƶƻƾǣǤǥǦǨǩǫǬǮǯǱǳǴǵǹǺǽǾǿȣȧȨȰȴȵȷɡɥɧɨɬɱɲɴɸɹɾʤʥʦʨʪʫʬʱʴʵʶʻ˧˫˭˰˳˵˶˸˿̷̸̡̢̧̬̯̰̱̲̳̾ͭͳͷͺͼͿΤΥΧΪΫάέΰαγνϮϰϳϷϸϺϽϿХЫЭЮЯвгдйклпѡѢѤѧѫѯѰѱѵѶѷѹѻѼҡҢңҤҥҩүҳҵҶҽҿӣӤӥӦӧӨөӪӫӬӮӱӴӵӶӸӻӽӿԤԦԧԨԯ԰ԱԲԵԶԸԼԾԿաբդթիծձյնշոջսְִֽֿ֣֤֡֯פרשת׬׮ׯװױ׳״׶׸׹׺׻';
    var convert_big = '}@KO\WT[CkOͽ^rU݅ؐ^NvP]߅H׃qpeTlIePKKgNaؔQMKNnœ}ȃԜyԌvs׋pPaULLcSn܇؉mrηQ\GVtYuX_xPIIhNzrA|̎JNbo~n[ąfZe_JđQhʎnvu\Ifc|늝{ՙBVӆG|ӗY٪xـ呔྄ꠌDgZZ~ӞIDElPym\C؜LwuUM^SShLTpSPwݗoxؓӇD`ԓ}wsM䓾VV怔RwtomؕhϘُMP^^T؞VҎw|܉ԎF݁L假^nh̖uQRMaZtoWAԒщĚgh߀QoSe]xVxZMdLȝⷫ@؛CeEIuO݋DEӋӛH^oAvaZ⛃r{OԹ{gD}OzA|캆p]b`vҊIŞTuR{YvuzɔqCe_UgI^MAܝY]þo\H֔MxaMGoL@ioRdQmfxe䏑քNXQE^x܊E_PwnѝFK~Vr̝hQUϞDRه{ڔr@@m׎[|EƄڝDIhxeY[v۞r`zɏB砑ziĘ朑ٟZvՏ|炫CR[CUg⏜R`XIs@\Ŕn]Ǌ䓧tJRB]tu̔THXHҿ|]VGn\y݆S]Փ}_߉茻jjaΛRRIu~}mzUM֙؈^TQN]VTi[iҒdR瑑}Qև\c{yX[HȔMāfB懙Qo~ērZWtIaPri_hlؚO{uH䁃WVDĚRTM◉әLTUwtXQ\lqܠN@̃SN[`JHpAՈcFڅ^|xEso_׌_@gJxsqܛJc_wِ}ߝxYhW٠pBdΔzOIBK}{ԊƕrgRmҕԇ۫FݔHgQplfTqzZAb\KVCmSqOpSsiHEB؝cTՄUCdӑLv`R}wϗlNFd N~y^dDTFj͑ÓrWEDmBfWf`HSȔξ^lyY΁uCPu@_oʏǉ]F`au㊑rݠ{bMBvrwyte@UFIhWwlԔʒNԇ[ϐfy{Cax\dPC̓uSwm܎x_kWԃZӖӍdfӠ鎟}rGVPꖰWBӬubG{ˎ퓘I~tUzxρˇ|xԄhxg[ay[ыtΞIωAfѓbxԁn]♪q[Tݛ~OcZZnRzuASxY@@TAhsS耎[yE\NjsdٝEv菗^؟t\ٛ܈lpSֱKݚ䗣`q~ÛwUHN@ؑᘂ\ꇒ걠bC̼S|RKN[\aSEiTDTATBvuDٍfbyѠF٘YՁƝYnۙCvu{M荠';

    if (1 == mod) {
        convert_src = convert_sp;
        convert_des = convert_big;
    } else {
        convert_des = convert_sp;
        convert_src = convert_big;
    }
    
    for(var i = 0; i < cc.length; i++){
        tmpidx = convert_src.indexOf(cc.charAt(i));
        if(tmpidx != -1) {
            str += convert_des.charAt(tmpidx);
        } else {
            str += cc.charAt(i);
        }
    }
    return str;
}
