/*
	 * Returns an new XMLHttpRequest object, or false if the browser
	 * doesn't support it
	 */
	function newXMLHttpRequest() 
	{
		  var xmlreq = false;
		
		  // Create XMLHttpRequest object in non-Microsoft browsers
		  if (window.XMLHttpRequest) 
		  {
			xmlreq = new XMLHttpRequest();
		  } 
		  else if (window.ActiveXObject) 
		  {    
		    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 by any means
		        xmlreq = false;
		      }
		    }
		  }
	
		return xmlreq;
	}

	/*		
	* Returns a function that waits for the specified XMLHttpRequest
	* to complete, then passes it 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 () 
		{
			// alert("in getReadyStateHandler: " + req.readyState + " : " + req.status);
	     	// If the request's status is "complete"
	     	if (req.readyState == 4) 
	     	{
	       		// Check that we received a successful response from the server
	       		if (req.status == 200) 
	       		{	
	         		// Pass the XML payload of the response to the handler function.
	         		//responseXmlHandler(req.responseXML);
	         		responseXmlHandler(req.responseText); 	
	       		} 
	       		else 
	       		{	
					// An HTTP problem has occurred
	         		//alert("HTTP error "+req.status+": "+req.statusText);
	       		}
	     	}
	   	}
	}