/** XHConn - Simple XMLHTTP Interface - bfults@gmail.com - 2005-04-08        **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
function XHConn()
{
  var xmlhttp, bComplete = false;
  try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }// alert("Msxml2.XMLHTTP");}
  catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }// alert("Microsoft.XMLHTTP"); }
  catch (e) { try { xmlhttp = new XMLHttpRequest(); }// alert("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") {
                  //alert(sURL+"?"+sVars);
                  xmlhttp.open(sMethod, sURL+"?"+sVars, true);
            }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(){
            try{
                    //alert(xmlhttp.readyState+' '+xmlhttp.status);//+' '+xmlhttp.statusText);
                    //if (xmlhttp.readyState == 4 && xmlhttp.status==200 && !bComplete)
                    if (xmlhttp.readyState == 4 && !bComplete)  
                    {              
                      bComplete = true;
                      fnDone(xmlhttp);
                    }
            }catch(e) {
                  //for (item in e ) alert( "error."+ item +" = " + e[item]) ; 
                  //alert(e);
            }
            };
            xmlhttp.send(sVars);
        }
        catch(e) { /*alert(e);*/  return false; }
        return true;
  };
  return this;
}