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RadComboBox Error: JavaScript runtime error: Unable to get property 'documentElement' of undefined or null reference

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Devendra
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Devendra asked on 07 Oct 2013, 06:44 AM

I upgrade to IE 10 today and was debugging my website that uses Telerik AJAX Controls (Version 2011.2.915.40) and am getting a

JavaScript runtime error: Unable to get property 'documentElement' of undefined or null reference


this happens when I click the arrow on the RadComboBox (also happens when I hover over a RadGrid).
I noticed that it happens only when I am debugging the site on IE10 (Even happens if I choose 'Start without debugging' option in VS 2010).
I found that the java script error is occurred inside dynamically loaded java script file “Telerik.Web.UI.Common.Core.js” at statement (var C=a.document.documentElement

) by HttpHandler “Telerik.Web.UI.WebResource.axd” for Telerik control.

If I host the site on IIS 7.5 and open it in IE 10, then I don't get the JavaScript error, however the RadComboBox does not drop down.

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Plamen
Telerik team
answered on 10 Oct 2013, 06:52 AM
Hello,

 
The issue is caused because the version of RadControls you are using is created in September 2011 and IE10 was officially released on 4 September 2012. In such case I will recommend you to update your RadControls version.

Hope this will explain the issue.

Regards,
Plamen
Telerik
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Plamen
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