/** * Written by Thierry Schellenbach * http:www.mellowmorning.com/2007/10/25/introducing-a-cross-site-ajax-plugin-for-prototype/ * Version 0.8.0 for Prototype 1.5.0 * Developed for www.commenthub.com * * modeled after XmlHttpRequest http: * en.wikipedia.org/wiki/XMLHttpRequest * functions open, send (setRequestHeader) - variable readyState, status * * 0 = uninitialized - open() has not yet been called. * 1 = open - send() has not yet been called. * 2 = sent - send() has been called, headers and status are available. * 3 = receiving - Downloading, responseText holds partial data. * 4 = loaded - Finished. * * for which prototype does this: * ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'] * unfortunately the onreadystatechange only works for the last 3, because * prototype 1.5.0 assigns it too late, for our usage and prevents status 1 * Prototype uses a timer, which in tests lead onSuccess to occur before onLoading * We use respondToReadyState to make a direct instruction and bypass the filter * * TODO: * Removal of