/** 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();
		if (xmlhttp.overrideMimeType) {
			// set type accordingly to anticipated content type
			xmlhttp.overrideMimeType('text/xml');
			//http_request.overrideMimeType('text/html');
		}
		try {
			if (sMethod == "GET") {
				xmlhttp.open(sMethod, sURL+"?"+sVars , true);
				//xmlhttp.open(sMethod, sURL+"?r="+new Date().getTime()+((sVars.length>0)? "&"+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;
}