// start up the connection
function XHConn(){
  var xmlhttp, bComplete = false;
  try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }
  catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
  catch (e) { try { xmlhttp = new XMLHttpRequest(); }
  catch (e) { xmlhttp = false; }}}
  
	if (!xmlhttp) return null;
	
  this.connect = function(sURL, sMethod, sVars, fnDone) {
		
    if (!xmlhttp) return false;
    bComplete = false;
    sMethod = sMethod.toUpperCase();

    try {
			if (sMethod == "GET") {
        xmlhttp.open(sMethod, sURL+"?"+sVars, true);
        sVars = "";
      } else {
        xmlhttp.open(sMethod, sURL, true);
        xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
        xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
      }
			xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState == 4 && !bComplete) {
          bComplete = true;
          fnDone(xmlhttp);
        }
			};
      xmlhttp.send(sVars);
    } catch(z) { 
			return false; 
		}
    return true;
  };
  return this;
}

// start new connection
var conn = new XHConn();