Line: 8 Error: Object doesn't support this property or method

[Faifal]

I am getting the following Javascript error:

Line: 8
Error: Object doesn't support this property or method

the following line of code is shown when debugging the code. 

!v&&b.length>1&&d(b,"")>-1&&(j=RegExp(this.source,e.replace.call(c(this),"g","")),e.replace.call(a.slice(b.index),j,function(){for(var a=1;a<arguments.length-2;a++)arguments[a]===void 0&&(b[a]=void 0)

The javascript file that is purporting the error is in "itn.js". 

I am getting this error when a Rad combo box is used as an editor for a column and when I click the drop down button to display the list of items within the drop down. Now I get the error only in IE Version 8.0.7601.17514 and not the other browsers. I checked to see if it was something in my code but its not. I am also receiving the error from your Demo site on the following page:

http://demos.telerik.com/aspnet-ajax/treelist/examples/columns/columntypes/defaultcs.aspx

it is on the second treelist control where the "Title Of Courtesy" contains a RadComboBox. Again when I click the drop down button on the control it throws the above javascript error. It never drops down the list of items on the control.

Any help on this I would greatly appreciate it.

Thanks

[Radoslav]

Hello Faifal,

I tried to reproduce the described problem, but to no avail. On the following link I attached a small video which demonstrates that the mentioned example works as expected under IE 8. Could you please provide us exact steps for reproducing the described issue.

Looking forward for your reply.

Greetings,
Radoslav
the Telerik team