if(!Object.prototype.toJSONString)
{
 Array.prototype.toJSONString = function () 
 {
  var a=['['],b,i,l = this.length,v;
  function p(s){if(b){a.push(',');}a.push(s);b=true;}
  for(i=0;i<l;i+=1)
  {
   v=this[i];
   switch(typeof v)
   {
    case 'undefined':
    case 'function':
    case 'unknown': break;
    case 'object':if(v) {if(typeof v.toJSONString === 'function'){p(v.toJSONString());}} else {p("null");}break;
    default: p(v.toJSONString());
   }
  }
  a.push(']');
  return a.join('');
 };

 Boolean.prototype.toJSONString = function () {return String(this);};

 Date.prototype.toJSONString = function ()
 {
  function f(n) {return n < 10 ? '0' + n : n;}
  return '"' + this.getFullYear() + '-' + f(this.getMonth() + 1) + '-' + f(this.getDate()) + 'T' +
             f(this.getHours()) + ':' + f(this.getMinutes()) + ':' + f(this.getSeconds()) + '"';
 };

 Number.prototype.toJSONString = function () { return isFinite(this) ? String(this) : "null"; };

 Object.prototype.toJSONString = function ()
 {
  var a=['{'],b,i,v;
  function p(s){if(b){a.push(',');}a.push(i.toJSONString(), ':', s);b=true;}
  for(i in this)
  {
   if(this.hasOwnProperty(i))
   {
    v=this[i];
    switch(typeof v)
    {
     case 'undefined':
     case 'function':
     case 'unknown':break;
     case 'object':if(v){if(typeof v.toJSONString === 'function') {p(v.toJSONString());}} else {p("null");}break;
     default:p(v.toJSONString());
    }
   }
  }
  a.push('}');
  return a.join('');
 };

 (function (s)
 {
  var m = {'\b':'\\b', '\t':'\\t', '\n':'\\n', '\f':'\\f', '\r':'\\r', '"':'\\"', '\\':'\\\\'};
  s.parseJSON = function (filter) 
  {
   try 
   {
    if(/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.
    test(this)) 
    {
     var j = eval('(' + this + ')');
     if(typeof filter === 'function') 
     {
      function walk(k, v){if(v && typeof v === 'object'){for(var i in v) {if(v.hasOwnProperty(i)){v[i] = walk(i, v[i]);}}}return filter(k, v);}
      return walk('', j);
     }
     return j;
    }
   } 
   catch (e) {}
   throw new SyntaxError("parseJSON");
  };

  s.toJSONString = function ()
  {
   if(/["\\\x00-\x1f]/.test(this)) 
   {
    return '"' + this.replace(/([\x00-\x1f\\"])/g,function(a,b){var c=m[b];if(c){return c;}c=b.charCodeAt(); return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);}) + '"';
   }
   return '"' + this + '"';
  };
 })(String.prototype);
}