/*
 * sendRequest
 * Send an XMLHttpRequest to the web service
 * handler - callback function
 * serviceName - name of the web service function to call
 * args - arguments to the service function
 */
 
function sendRequest(handler, serviceName, args)
{
  // Obtain an XMLHttpRequest instance
  var req = newXMLHttpRequest();

  // Set the handler function to receive callback notifications
  // from the request object
  if (handler)
  {
    var handlerFunction = getReadyStateHandler(req, handler);
    req.onreadystatechange = handlerFunction;
  }

//http://localhost/
  var service='http://www.anagor4.com/AWWWebService/AWWWS2.asmx/'+ serviceName;
  //var service = 'http://www.anagor4.com/aww/';//document.location.href;
  //service = service.substr(0,service.lastIndexOf('/'));
  
  //service = service + "DesktopModules/AnagoWebWorld/AWWWebService.asmx/" + serviceName;
  
  // Open an HTTP POST connection to the shopping cart servlet.
  // Third parameter specifies request is asynchronous.
  req.open("POST", service, true);

  // Specify that the body of the request contains form data
  req.setRequestHeader("Content-Type", 
                       "application/x-www-form-urlencoded");

  req.send(args);
}

/*
 * Returns a new XMLHttpRequest object, or false if this browser
 * doesn't support it
 */
function newXMLHttpRequest() {

  var xmlreq = false;

  if (window.XMLHttpRequest) {

    // Create XMLHttpRequest object in non-Microsoft browsers
    xmlreq = new XMLHttpRequest();

  } else if (window.ActiveXObject) {

    // Create XMLHttpRequest via MS ActiveX
    try {
      // Try to create XMLHttpRequest in later versions
      // of Internet Explorer

      xmlreq = new ActiveXObject("Msxml2.XMLHTTP");

    } catch (e1) {

      // Failed to create required ActiveXObject

      try {
        // Try version supported by older versions
        // of Internet Explorer

        xmlreq = new ActiveXObject("Microsoft.XMLHTTP");

      } catch (e2) {

        // Unable to create an XMLHttpRequest with ActiveX
      }
    }
  }

  return xmlreq;
}



/*
 * Returns a function that waits for the specified XMLHttpRequest
 * to complete, then passes its XML response
 * to the given handler function.
 * req - The XMLHttpRequest whose state is changing
 * responseXmlHandler - Function to pass the XML response to
 */
function getReadyStateHandler(req, responseXmlHandler) {

  // Return an anonymous function that listens to the 
  // XMLHttpRequest instance
  return function () {

    // If the request's status is "complete"
    if (req.readyState == 4) {
      
      // Check that a successful server response was received
      if (req.status == 200) {

        // Pass the XML payload of the response to the 
        // handler function
        responseXmlHandler(req.responseXML);

      } else {

        // An HTTP problem has occurred
        alert("HTTP error: "+req.status + " MOTIVATION: " + req.statusText );
      }
    }
  }
}