/** 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;
}