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("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");
        xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
      }
      xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState == 4 && !bComplete){
          bComplete = true;
          fnDone(xmlhttp);
        }
      };
      xmlhttp.send(sVars);
    }
    catch(z){ 
      return false;
    }
    return true;
  };
  return this;
}