function ajax_lib() {
  //---------------------
  // Private Declarations
  //---------------------
  var _request = null;
  var _this = null;

  //--------------------
  // Public Declarations
  //--------------------
  this.GetResponseXML = function() {
    return (_request) ? _request.responseXML : null;
  }
        
  this.GetResponseText = function() {
    return (_request) ? _request.responseText : null;
  }

  this.GetResponse = function() {
    return(this.GetResponseText().split("|"));
    
  }

  this.GetRequestObject = function() {
    return _request;
  }

  this.post = function(Uri, Params) {
    this.SetRequestHeader("Content-length", Params.length);
    this.InitializeRequest('POST', Uri);
    this.Commit(Params);
  }

  this.get = function(Uri) {
    this.InitializeRequest('GET', Uri);
    this.Commit(null);
  }

  this.InitializeRequest = function(Method, Uri) {
    _InitializeRequest();
    _this = this;
    switch (arguments.length) {
      case 2:
        _request.open(Method, Uri);
       break;
      case 3:
        _request.open(Method, Uri, arguments[2]);
        break;
    }
                
    if (arguments.length >= 4) _request.open(Method, Uri, arguments[2], arguments[3]);
    this.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
    this.SetRequestHeader("Connection", "close");
  }
        
  this.SetRequestHeader = function(Field, Value) {
    if (_request) _request.setRequestHeader(Field, Value);
  }
        
  this.Commit = function(Data) {
    if (_request) _request.send(Data);
  }
        
  this.Close = function() {
    if (_request) _request.abort();
  }
        
  //---------------------------
  // Public Event Declarations.
  //---------------------------
  this.OnUninitialize = function() { };
  this.OnLoading = function() { };
  this.OnLoaded = function() { };
  this.OnInteractive = function() { };
  this.OnSuccess = function() { };
  this.OnFailure = function() { };
        
  //---------------------------
  // Private Event Declarations
  //---------------------------
  function _OnUninitialize() { _this.OnUninitialize(); };
  function _OnLoading() { _this.OnLoading(); };
  function _OnLoaded() { _this.OnLoaded(); };
  function _OnInteractive() { _this.OnInteractive(); };
  function _OnSuccess() { _this.OnSuccess(); };
  function _OnFailure() { _this.OnFailure(); };

  //------------------
  // Private Functions
  //------------------
  function _InitializeRequest() {
    _request = _GetRequest();
    _request.onreadystatechange = _StateHandler;
  }
        
  function _StateHandler() {
      switch (_request.readyState) {
      case 0:
        window.setTimeout("void(0)", 100);
        _OnUninitialize();
        break;
      case 1:
        window.setTimeout("void(0)", 100);
        _OnLoading();
        break;
      case 2:
        window.setTimeout("void(0)", 100);
        _OnLoaded();
        break;
      case 3:
        window.setTimeout("void(0)", 100);
        _OnInteractive();
        break;
      case 4:
        if (_request.status == 200)
         _OnSuccess();
        else
         _OnFailure(); 
         return;
       break;
    }
  }
        
  function _GetRequest() {
    var obj;
                
    try {
      obj = new XMLHttpRequest();
    }
    catch (error) {
      try {
        obj = new ActiveXObject("Msxml2.XMLHTTP");
      }
      catch (error) {
        try {
          obj = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (error) {
          return null;
        }
      }
    }
    return obj;
  }
}