function AJAXConnection(newURL, newParameters) 
{
  this.onchange = null;
  
  this.ie               = false;
  this.url              = newURL;
  this.parameters       = newParameters;
  this.body             = null;  
  this.callbackfunction = null;

  if (typeof(_AJAXConnection_prototype_called) == 'undefined')
  {
    _AJAXConnection_prototype_called              = true;
    AJAXConnection.prototype.setRequestTag        = setRequestTag;
    AJAXConnection.prototype.getRequestTag        = getRequestTag;
    AJAXConnection.prototype.setCallbackFunction  = setCallbackFunction;
    AJAXConnection.prototype.getResponseText      = getResponseText;
    AJAXConnection.prototype.getResponseXML       = getResponseXML;
    AJAXConnection.prototype.callBack             = callBack;
    AJAXConnection.prototype.get                  = get;
    AJAXConnection.prototype.post                 = post;
  }

  function setRequestTag(newBody)
  {
    this.body = newBody;
  }
    
  function getRequestTag()
  {
    return this.body;
  }
  
  function setCallbackFunction(newCallbackfunction)
  {
    this.callbackfunction = newCallbackfunction;
  }
  
  function getResponseText()
  {
    if (this.rpc_request != null) return this.rpc_request.responseText;
    else return null;
  }
  
  function getResponseXML()
  {
    if (this.rpc_request != null) return this.rpc_request.responseXML;
    else return null;
  }
  
  function callBack(self)
  {
    if (self != null && self.rpc_request.readyState == 4)
    {
      if (self.callbackfunction != null) self.callbackfunction();
    }
  }

  function get(wait) 
  {
    if (wait == null) wait = true;
    this.rpc_wait = wait;
    
    var self = this;
    
    if (window.XMLHttpRequest)
    {
      this.rpc_request = new XMLHttpRequest();
      this.rpc_request.onreadystatechange = function() { self.callBack(self);  }
    }
    else if (window.ActiveXObject) 
    {
      this.ie = true;
      this.rpc_request = new ActiveXObject("Microsoft.XMLHTTP");
      if (this.rpc_request) this.rpc_request.onreadystatechange = function() { self.callBack(self);  }
    }
    
    this.rpc_request.open("GET", this.url, !this.rpc_wait);
    if (this.ie) this.rpc_request.send();
    else this.rpc_request.send(null);
  }
  
  function post(wait)
  {
    if (this.parameters == null) this.parameters = "";
    if (this.url)
    {
      var self = this;
      if (wait == null) wait = true;
      if (window.XMLHttpRequest)
      {
        this.rpc_request = new XMLHttpRequest();
        this.rpc_request.onreadystatechange = function() { self.callBack(self); }
        this.rpc_request.open("POST", this.url, !wait);
        this.rpc_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");
        this.rpc_request.setRequestHeader("Content-length", this.parameters.length);
        this.rpc_request.setRequestHeader("Connection", "close");
        this.rpc_request.send(this.parameters);
      }
      else if (window.ActiveXObject)
      {
        this.rpc_request = new ActiveXObject("Microsoft.XMLHTTP");
        if (this.rpc_request)
        {
          this.rpc_request.onreadystatechange = function() { self.callBack(self); }
          this.rpc_request.open("POST", this.url, !wait);
          this.rpc_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");
          this.rpc_request.setRequestHeader("Content-length", this.parameters.length);
          this.rpc_request.setRequestHeader("Connection", "close");
          this.rpc_request.send(this.parameters);
        }
      }
    }
  }
}