72 Part I: Core Ideas
approach may not be the best course of action. Consider that it is possible for the user to
turn off native XMLHttpRequest under the Advanced tab of Internet Options, which will
then only allow for an ActiveX XHR.More likely, the user can turn off ActiveX support in Internet Explorer by adjusting their
security settings, as shown next.Of course, it might be possible that the user disables both features but somehow keeps
JavaScript on. In this case, it is necessary to degrade to an alternate JavaScript communication
mechanism from the previous chapter, degrade to a standard post-and-wait style form of