/** 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"); 
  }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;
}