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Editorial Team
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Asked: 2026-05-14T20:26:40+00:00

What am I doing wrong? According to specs lowering domain with JavaScript should be

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What am I doing wrong? According to specs lowering domain with JavaScript should be possible in IE8 and IE7 but my code only works in Firefox and throws an Argument Exception in IE.

<html xmlns="http://www.w3.org/1999/xhtml" >
<body onload="alert(document.domain); try { document.domain = 'if.se' } catch(e) { alert(e); }; alert(document.domain);">
</body>
</html>

Edit

The problem might be because of two letter domain. I tested with three letter domain (iff.se) and it worked, but a two letter domain failed (if.se)

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1 Answer

  1. Editorial Team

    It’s probably getting caught inside a sanity check to make sure you don’t try and set document.domain to co.uk or something silly like that.

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