function AjaxResult(success, item) {
	this.success = success;
	this.item = item;
}

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

	try {
		return new ActiveXObject('Msxml2.XMLHTTP');
	} catch (e1) {}
  
	try {
		return new ActiveXObject('Microsoft.XMLHTTP');
    } catch (e2) {}
    
    try {
    	return new XMLHttpRequest();
    } catch (e3) {}

	return false;
}

/*
 * 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.responseText);

      } else {

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

function ajaxRequest(url, handler) {
	var req = newXMLHttpRequest() || alert("No ajax! AHHH!");
	req.onreadystatechange = getReadyStateHandler(req, handler);
	req.open("GET", url, true);
	req.send(null);
}