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Editorial Team
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Asked: 2026-06-06T19:50:41+00:00

I have spent hours in this problem and my fellows couldn’t help me out.

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I have spent hours in this problem and my fellows couldn’t help me out. He said it might be a cross-site scripting problem, probably my system setting cause this problem because the script runs well on my fellow’s machine.

Below is the simple case: 

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var req = new XMLHttpRequest();
var url = "http://www.javascriptkit.com/dhtmltutors/javascriptkit.json";
req.open("GET", url, false);
try {
    req.send();
} catch (e) {
    alert("ERROR: " + e);
}
</script>
</head>
<body>
</body>
</html>

Execute the code, an error shows up: 

ERROR: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE)"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: chrome://firebug/content/console/commandLineExposed.js :: <TOP_LEVEL> :: line 156"  data: no]

I ran this code on my localhost, firebug console and jsFiddle, all of them are not working.

I am sure my local server is running well since the test script alert("works") is working.

Anyone can help me out here. Is this a system setting problem? Thanks!

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1 Answer

  1. Editorial Team

    XMLHttpRequest to a different domain? Unless they set a header Access-Control-Allow-Origin in their response, you won’t be able to get at it. In Opera (well, version 11.64 at least), you won’t be able to get at it, regardless.

    I think your colleague’s machine is insecurely configured.

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