User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7 After firing a XML HTTP Request, FireFox 1.5.0.7 can't see the readyState property of it. This is an "expanded" version of bug #343769: FF can't even detect the readyState code 1. Reproducible: Always Steps to Reproduce: 1. Given this AJAX function: function retrieveDate() { http_request = false; if (window.XMLHttpRequest) { http_request = new XMLHttpRequest(); if (http_request.overrideMimeType) { http_request.overrideMimeType('text/xml'); } } if (!http_request) { alert("Can't handle XHR's."); } http_request.onreadystatechange = function () { alert('Function called. Actual state: ' + http_request.readyState); if (http_request.readystate == 4) { if (http_request.status == 200) { alert(http_request.responseXML); } else { alert('Server Error!'); } } else { alert(http_request.readyState); } } http_request.open('GET', 'http://localhost/foo/bar.php', false); http_request.send(null); } 2. And calling it in any fashion (onClick on a button, onLoad on the body tag, etc...) Actual Results: FF shows the first alert of the onreadystatechange function, thus never showing the responseXML property of the request. Expected Results: Two alerts for each state change until 4 (0, 1, 2 and 3) containing "Function called. Actual state: ' + http_request.readyState" and a final alert containing the XML returned by the server. This happens with both async and sync XHR's. Tested with safe-mode. Works on different browsers. Works on FF 1.5.0.6.

Correction: Actual results: FF *doesn't* show the first alert of the onreadystatechange function, thus never showing the responseXML property of the request. Expected results: Two alerts for each state change until 4 (0, 1, 2 and 3), one containing "Function called. Actual state: ' + http_request.readyState" and the other containing just the readyState code. A final alert containing the XML returned by the server.

*** This bug has been marked as a duplicate of 313646 ***

confirm on FF 3.0.1 <script> r=new XMLHttpRequest() r.onreadystatechange=function(){if(r.readyState==4)alert(r.responseText)} r.open('GET','1.txt',false) r.send(null) </script>