Hi support Telerik,
I have the problem as following :
- I use Telerik.Web.UI dll version 2011.2.915.35 and use RadAjaxManager and RadAjaxLoadingPanel to run Ajax.
- I have a button when click this button then it will run Ajax
The first time I click button it seem run everything ok, but the second time I click button then I see an issue javascrippt error as following:
  Object doesn't support this property or method at code line : if($telerik.$(b).css("filter").indexOf("opacity")!=-1||$telerik.$(b.firstChild.nextSibling).css("filter").indexOf("opacity")!=-1)
My environment use IE8 with https and windows server 2008. Please hepl me resolve this issue ?
Thank you so much.
John Avata.

Hello John,

I think it will be best if you can open a formal support ticket and send us a simple running project demonstrating the problems. In that way we can reproduce the javascript error on our side, understand the logic of your application and provide a solution.

Best wishes,
Pavlina
the Telerik team

I am also facing a similar problem with the controls.
But the starnge thing is that its working fine on our development envrionment but gives error on QA.

Kindly advice.

Hi Ali,

The issue that you described seem to be web resources related. I suppose that there are some differences in the web.config files of the different environments that cause it. However, as I said in the previous post in order to be able to help you with this problem we should be able to replicate it on our side first. That is why I suggest you open a support ticket and send a sample project which we can debug locally.

Regards,
Pavlina
Telerik