Posted on: 7/22/2013 9:09:55 PM | Views : 1576

This weekend I updated a machine to Windows 8 and Visual Studio 2013. I've started noticing Javascript errors coming from IE on aspx pages with the following error:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.2; WOW64; Trident/6.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729; InfoPath.3) Timestamp: Mon, 22 Jul 2013 21:06:39 UTC
Message: 'WebForm_AutoFocus' is undefined Line: 270 Char: 49 Code: 0 URI: http://localhost:10000/main/SummaryScreen.aspx

I wasn't seeing this error in the same code base on IE10/WIndows 7/VS 2012. I can load a QA version of the site not hosted on my machine in IE10 and I don't see the errors, so I assume it's something locally on the machine or in the 2013 preview. Any ideas?

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