<!--
/**
* Open a connection to the specified URL, which is
* intended to respond with an XML message.
* 
* @param string method The connection method; either "GET" or "POST".
* @param string url    The URL to connect to.
* @param string toSend The data to send to the server; must be URL encoded.
* @param function responseHandler The function handling server response.
*/
function xmlOpen(method, url, toSend, responseHandler)
 {
     if (window.XMLHttpRequest)
     {
         // browser has native support for XMLHttpRequest object
         req = new XMLHttpRequest();
     }
     else if (window.ActiveXObject)
     {
         // try XMLHTTP ActiveX (Internet Explorer) version
         req = new ActiveXObject("Microsoft.XMLHTTP");
     }
     
     if(req)
     {
         req.onreadystatechange = responseHandler;
         req.open(method, url, true);
         req.setRequestHeader("content-type","application/x-www-form-urlencoded");
         req.send(toSend);
     }
     else
     {
         alert('Your browser does not seem to support XMLHttpRequest.');
     }
 } 
//-->