var bXmlHttpSupport = (typeof XMLHttpRequest == "object"   ||
                       typeof XMLHttpRequest == "function" ||
                       window.ActiveXObject );

function httpPost(sURL, sParams) {

    var oURL = new java.net.URL(sURL);
    var oConnection = oURL.openConnection();

    oConnection.setDoInput(true);
    oConnection.setDoOutput(true);
    oConnection.setUseCaches(false);
    oConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    var oOutput = new java.io.DataOutputStream(oConnection.getOutputStream());
    oOutput.writeBytes(sParams);
    oOutput.flush();
    oOutput.close();

    var sLine = "", sResponseText = "";

    var oInput = new java.io.DataInputStream(oConnection.getInputStream());
    sLine = oInput.readLine();

    while (sLine != null){
        sResponseText += sLine + "\n";
        sLine = oInput.readLine();
    }

    oInput.close();

    return sResponseText;
}

function addPostParam(sParams, sParamName, sParamValue) {
    if (sParams.length > 0) {
        sParams += "&";
    }
    return sParams + encodeURIComponent(sParamName) + "="
                   + encodeURIComponent(sParamValue);
}

function addURLParam(sURL, sParamName, sParamValue) {
    sURL += (sURL.indexOf("?") == -1 ? "?" : "&");
    sURL += encodeURIComponent(sParamName) + "=" + encodeURIComponent(sParamValue);
    return sURL;
}

function httpGet(sURL) {
    var sResponseText = "";
    var oURL = new java.net.URL(sURL);
    var oStream = oURL.openStream();
    var oReader = new java.io.BufferedReader(new java.io.InputStreamReader(oStream));

    var sLine = oReader.readLine();
    while (sLine != null) {
        sResponseText += sLine + "\n";
        sLine = oReader.readLine();
    }

    oReader.close();
    return sResponseText;
}

var Http = new Object;

if (typeof XMLHttpRequest == "undefined" && window.ActiveXObject) {

    Http.XMLHttpRequest = function() {

        var arrSignatures = ["MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0",
                             "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP",
                             "Microsoft.XMLHTTP"];

        for (var i=0; i < arrSignatures.length; i++) {
            try {

                var oRequest = new ActiveXObject(arrSignatures[i]);

                return oRequest;

            } catch (oError) {
                //ignore
            }
        }

        throw new Error("MSXML is not installed on your system.");
    }
} else {
   // opera / firefox
   Http.XMLHttpRequest = XMLHttpRequest;
}

Http.get = function (sURL, fnCallback) {

    if (bXmlHttpSupport) {

        var oRequest = new Http.XMLHttpRequest();
        oRequest.open("get", sURL, true);
        oRequest.onreadystatechange = function () {
            if (oRequest.readyState == 4) {
                fnCallback(oRequest.responseText);
            }
        }
        oRequest.send(null);

    } else if (navigator.javaEnabled() && typeof java != "undefined"
            && typeof java.net != "undefined") {

        setTimeout(function () {
            fnCallback(httpGet(sURL));
        }, 10);
    } else {
        alert("Your browser doesn't support HTTP requests.");
    }

};

Http.post = function (sURL, sParams, fnCallback) {

    if (bXmlHttpSupport) {

        var oRequest = new Http.XMLHttpRequest();
        oRequest.open("post", sURL, true);
        oRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        oRequest.onreadystatechange = function () {
            if (oRequest.readyState == 4) {
                fnCallback(oRequest.responseText);
            }
        }
        oRequest.send(sParams);

    } else if (navigator.javaEnabled() && typeof java != "undefined"
            && typeof java.net != "undefined") {

        setTimeout(function () {
            fnCallback(httpPost(sURL, sParams));
        }, 10);
    } else {
        alert("Your browser doesn't support HTTP requests.");
    }

};