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Since this is part of an HTML document you should escape the & by replacing it by &

An ampersand '&' in HTML mark the start of a character reference entity such as < > and é

Literal ampersands in your document should be written as &

Note that if that code is generated dynamical you should also escape the URL so that it can appear in a javascript string as well.

Edited: I can confirm this particular problem occurs when pasting javascript code directly in the address bar. It seems HTML character escaping rules are irrelevant here after all.

I've googled a bit and found this blog post which identify that particular behavior as an ie bug.

Alexandre Jasmin 2009-12-31 04:46:47

This occurs even when you run javascript in the location bar.It would even occur when referring the function from a .js file.And doing this would break every other browser which doesn't expect javascript strings to be encoded. (It breaks chrome and firefox for sure - not sure about Opera)

HS 2009-12-31 05:17:57

@HS Your're right. I found this blog post about the issue it looks like an ie bug http://nedbatchelder.com/blog/200812/accidental_html_entities_in_urls.html

Alexandre Jasmin 2009-12-31 05:31:11

Nice find. I tried googling but didn't know what keywords to use. Re-arranging the query string would solve this problem. Thanks. I'm going to mark this answer as 'correct' - edit your post to add this link to it.

HS 2009-12-31 05:51:58

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