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POjQuery AJAX requests failing in IE8 with message 'Error: This method cannot be called until the open method has been called.'
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copied!<p>I'm using jQuery 1.4.2 and am trying to perform a simple AJAX request. The target URL returns a JSON string (I validated it with jslint). The request works in Firefox and Chrome, but doesn't want to work in IE8, and I can't determine why. Here is the call:</p> <pre><code>jQuery.ajax({ url: 'http://' + domain + '/' + 'helper/echo/', dataType: 'json', success: function(data) { alert(data); }, beforeSend: function(request, settings) { alert('Beginning ' + settings.dataType + ' request: ' + settings.url); }, complete: function(request, status) { alert('Request complete: ' + status); }, error: function(request, status, error) { alert(error); } }); </code></pre> <p>IE will execute the beforeSend callback and the error callback. The error callback alerts with the message:</p> <pre><code>Error: This method cannot be called until the open method has been called. </code></pre> <p>My response header returns with <code>Content-Type: text/javascript; charset=UTF-8</code>.</p> <p>What is going on with IE? I'm running the server on localhost, making a request from <a href="http://localhost:8080/psx">http://localhost:8080/psx</a> to <a href="http://localhost:8080/helper">http://localhost:8080/helper</a>. Maybe IE is blocking this request? I have tried installing Fiddler to analyze request traffic but it won't run on my machine because it's rather locked down. Firebug lets me, but everything seems good there.</p> <p>Thanks for the help!!!</p>

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