Simple implementation of Javascript json object and string conversion

function obj2str(o){
  var r = [];
  if(typeof o == "string" || o == null) {
   return o;
  }
  if(typeof o == "object"){
   if(!){
    r[0]="{"
    for(var i in o){
     r[]=i;
     r[]=":";
     r[]=obj2str(o[i]);
     r[]=",";
    }
    r[-1]="}"
   }else{
    r[0]="["
    for(var i =0;i<;i++){
     r[]=obj2str(o[i]);
     r[]=",";
    }
    r[-1]="]"
   }
   return ("");
  }
  return ();
}

function taoRan(){
var str='{"result": [["Cash Withdrawal", "219"], ["Cash withdrawal bank", "121"], ["Refund", "272"], ["Cash withdrawal failed", "16"], ["Group Buy", "15"], ["Taobao", "412"],["*", "58"], ["Cash withdrawal limit", "16"], ["Cash withdrawal time", "81"], ["* Certification", "26"]]}';
alert(strToObj(str).result[2]);
}
function strToObj(json){ 
     return eval("("+json+")"); 
}

//'
JsontostringCode 
function JsonToString(o) {  
  var arr = []; 
  var fmt = function(s) { 
    if (typeof s == 'object' && s != null) return JsonToStr(s); 
    return /^(string|number)$/.test(typeof s) ? "'" + s + "'" : s; 
  } 
  for (var i in o) 
     ("'" + i + "':" + fmt(o[i])); 
  return '{' + (',') + '}'; 
} 

function O2String(O) {
//return (jsonobj); 
var S = [];
var J = "";
if ((O) === '[object Array]') {
  for (var i = 0; i < ; i++)
    (O2String(O[i]));
  J = '[' + (',') + ']';
}
else if ((O) === '[object Date]') {
  J = "new Date(" + () + ")";
}
else if ((O) === '[object RegExp]' || (O) === '[object Function]') {
  J = ();
}
else if ((O) === '[object Object]') {
  for (var i in O) {
    O[i] = typeof (O[i]) == 'string' ? '"' + O[i] + '"' : (typeof (O[i]) === 'object' ? O2String(O[i]) : O[i]);
    ('"' + i + '":' + O[i]);
  }
  J = '{' + (',') + '}';
}
return J;
};