object does not support method or property 'contains'

[rajiv]

we have been using ckeditor 4.0.1 in Asp.net. The required functionality works fine in firebox and chrome. But having problem with IE 9 and gives an error as "object does not support method or property 'contains'".

Looking for the solution

[Jakub Ś]

I'm sorry but this in not support site but place for reporting bugs.

• If this is a bug report please get familiar with ​http://dev.ckeditor.com/wiki/Bugs.
• next please provide detailed description of the problem
• next please provide reduced app or test case file that shows this problem. Please note I'm talking about default CKEditor with no integration into its core code and no logic of your app. If such TC can't be created then this is probably error in your application.

Please provide missing information.