/** 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, msgCargando)
  {
	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 == 1 && msgCargando!="") {
			msgCargando;
			
		}
		if (xmlhttp.readyState == 4 && !bComplete)
		{ 
		  bComplete = true;
		  fnDone(xmlhttp);
		}};
	  xmlhttp.send(sVars);
	}
	catch(z) { return false; }
	return true;
  };
  this.submit = function(formu, args)
  {
	xmlhttp.submit(formu, args);
  };
  
  this.cancel = function(){xmlhttp.abort()}
  return this;
}