var xmlServiceHttp;
var xmlServiceDoc;
var responseStatus = 200;
var requestResult = "";

function createxmlServiceHttpRequest() {
    if (window.ActiveXObject) {
        xmlServiceHttp = new ActiveXObject("Microsoft.xmlHttp");
    }
    else if (window.xmlServiceHttpRequest) {
        xmlServiceHttp = new xmlServiceHttpRequest();
    }
}

Array.prototype.append = function(obj) {
    this[this.length] = obj;
}

function Param(index, type, value) {
    this.index = index;
    this.type = type;
    this.value = value;
}

function Service(serviceID) {
    this.serviceID = serviceID;
}

Service.prototype = {
    serverID : "", params : new Array()};

Service.prototype.invokeTest = function() {
    return this.serviceID;
}

Service.prototype.addParam = function(param) {
    this.params[param.index - 1] = param;
}

Service.prototype.setInt = function(idx, pvalue) {
    var param = new Param(idx, "int", pvalue);
    this.addParam(param);
}
Service.prototype.setBoolean = function(idx, pvalue) {
    var param = new Param(idx, "boolean", pvalue);
    this.addParam(param);
}
Service.prototype.setByte = function(idx, pvalue) {
    var param = new Param(idx, "byte", pvalue);
    this.addParam(param);
}
Service.prototype.setDouble = function(idx, pvalue) {
    var param = new Param(idx, "double", pvalue);
    this.addParam(param);
}
Service.prototype.setFloat = function(idx, pvalue) {
    var param = new Param(idx, "float", pvalue);
    this.addParam(param);
}
Service.prototype.setLong = function(idx, pvalue) {
    var param = new Param(idx, "long", pvalue);
    this.addParam(param);
}
Service.prototype.setShort = function(idx, pvalue) {
    var param = new Param(idx, "short", pvalue);
    this.addParam(param);
}

Service.prototype.setString = function(idx, pvalue) {
    var param = new Param(idx, "string", pvalue);
    this.addParam(param);
}

function formInput(service) {
    var inputStr = "<service> <serviceID>" + service.serviceID +
        "</serviceID> ";
    inputStr += "<parameters>";
    var params = service.params;
    for (var i = 0; i <  params.length; i++) {
        var param = params[i];
        inputStr += "<parameter " + "index=\"" + param.index + "\" type=\"" +
            param.type + "\">";
        inputStr += param.value + "</parameter>";
    }
    inputStr += "</parameters> </service>";
    return inputStr;
}

function handleServiceStateChange() {
      this.xmlServiceDoc = xmlServiceHttp.responseXML;
}

function getResponseStatus() {
    return this.xmlServiceDoc.getElementsByTagName("status")[0].childNodes[0].
        nodeValue;
}

function getRequestResult() {
    var result;
    try{
     result = this.xmlServiceDoc.getElementsByTagName("value")[0].childNodes[0].nodeValue;
    }catch(e){
      result =  "500,ϵͳæ!";
    }
    return result;
}

Service.prototype.invoke = function() {
    var inputXml = formInput(this);
    createxmlServiceHttpRequest();
    xmlServiceHttp.open("POST", "/ptxsoa/AjaxAdapter", false);
    xmlServiceHttp.onreadystatechange = handleServiceStateChange;
    xmlServiceHttp.setRequestHeader("Content-Type",
                                    "application/x-www-form-urlencoded;");
    xmlServiceHttp.send(inputXml);
}