XMLHttpRequest of ajax

        this._async = async;
      }
      if (arguments.length > 3)
      {
        opera.postError('XMLHttpRequest.open() - user/password not supported');
      }
      this.readyState = 1;
      if (this.onreadystatechange)
      {
        this.onreadystatechange();
      }
    };

    this.send = function(data)
    {
      if (!navigator.javaEnabled())
      {
        alert("XMLHttpRequest.send() - Java must be installed and enabled.");
        return;
      }
      if (this._async)
      {
        setTimeout(this._sendasync, 0, this, data);
      }
      else
      {
        this._sendsync(data);
      }
    };

    this._sendasync = function(req, data)
    {
      if (!req._aborted)
      {
        req._sendsync(data);
      }
    };

    this._sendsync = function(data)
    {
      this.readyState = 2;
      if (this.onreadystatechange)
      {
        this.onreadystatechange();
      }
      var url = new java.net.URL(new java.net.URL(window.location.href), this.url);
      var conn = url.openConnection();
      for (var i = 0; i < this._headers.length; i++)
      {
        conn.setRequestProperty(this._headers[i].h, this._headers[i].v);
      }
      this._headers = [];
      if (this.method == 'POST')
      {
      // POST data
        conn.setDoOutput(true);