I am trying to make my website compatible with IE8 and am having some javascript issues. In debugging mode for IE, I am noticing that all of the errors are coming from Telerik.Web.UI.WebResource.axd 

Some examples: Unable to get property 'documentElement' of undefined or null reference. On:

 var C=a.document.documentElement;

Or "Object doesn;t support property or method 'attachEvent' On:

if($telerik.isIE){document.attachEvent("onmousedown",this._onDocumentClickDelegate);

My current Telerik version is 2011.2.915.35

Does anyone have any ideas on how I can fix this.

Thanks,

Chris

Hi,

Are you testing with an actual installation of IE8 or are you using IETester or something similar? (if so, try the former, and see if this helps ... I've heard of IETester getting a bit confused in some instances)

thanks

Kris