Z index.html wywal
document.write('YEAH it works');
A w HtttpClient.js zastąp to
this.rXmlHttp.open(this.requestType,url,this.isAsync);
this.rXmlHttp.onReadyStateChange = this.readyStateChangeCallback();
this.rXmlHttp.send(payload);
this.rXmlHttp.onreadystatechange = this.readyStateChangeCallback();
tym
this.rXmlHttp.onReadyStateChange = this.readyStateChangeCallback();
this.rXmlHttp.open(this.requestType,url,this.isAsync);
this.rXmlHttp.send(payload);
i powinno zadziałać
Pod tym adresem http://www.w3schools.com/ajax/default.asp znajdziesz dosyć ciekawie napisany kurs ajaxa