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copied!<p>I'm not sure this is the same problem, but in my case all of these needed to be set: onerror; onprogress; ontimeout; and onload. Here are some references that discuss the problem:</p> <ul> <li><a href="http://social.msdn.microsoft.com/Forums/ie/en-US/30ef3add-767c-4436-b8a9-f1ca19b4812e/ie9-rtm-xdomainrequest-issued-requests-may-abort-if-all-event-handlers-not-specified" rel="nofollow">http://social.msdn.microsoft.com/Forums/ie/en-US/30ef3add-767c-4436-b8a9-f1ca19b4812e/ie9-rtm-xdomainrequest-issued-requests-may-abort-if-all-event-handlers-not-specified</a></li> <li><a href="http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/" rel="nofollow">http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/</a></li> <li><a href="http://rudovsky.blogspot.com/2012/09/microsoft-shit-xdomainrequest.html" rel="nofollow">http://rudovsky.blogspot.com/2012/09/microsoft-shit-xdomainrequest.html</a></li> <li><a href="https://github.com/faye/faye/pull/98" rel="nofollow">https://github.com/faye/faye/pull/98</a></li> </ul> <p>There are many others as well. They're scattered and sometimes contradictory in their suggested solution. For example, one suggests wrapping the xdr.send call in a setTimeout.</p> <p>The behavior I was seeing went away by adding non-blank bodies for each of the event handler functions. I'm not sure if all are necessary. The setTimeout wrapper was definitely <em>not</em> necessary.</p> <p>One possibly irrelevant piece of info: in my case I decided to bind each handler to the 'this' object. I also added function implementations to keep my compiler from assigning them all to the same empty function. My code was using GET, not POST. YMMV.</p> <p>Your code leaves one handler unset:</p> <pre><code>if (window.XDomainRequest) // Check whether the browser supports XDR. { xdr = new XDomainRequest(); // Create a new XDR object. if (xdr) { xdr.timeout = 3000;//Set the timeout time to 3 second. xdr.onload = function () { alert("Success"); }; xdr.onerror = function () { alert("Error"); }; xdr.ontimeout = function () { alert("Error"); }; // this also needs to be set xdr.onprogress = function() { window.console.log('progress'); }; xdr.open("post", urlSearch); xdr.send(); } } else { $.ajax({ url: urlSearch, type: 'POST', dataType: 'json', timeout: 3000, success: function (data) { alert("Success"); }, error: function () { alert("Error"); } }); } </code></pre>

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