Commented Unassigned: Error on watermarkcssClass [28009]

After I Installed Ajax 15.1.4.0, I had facing several ajax issue. When I run the program, there is an error keep appear " JavaScript runtime error: Object doesn't support property or method 'indexOf'".

After I removed my css from the property, there no more this error message.


My program using VS2010, framework 4.0


May I know how can I resolve this issue?

Thanks.
Comments: This error is fixed, see the [8aa8363](https://ajaxcontroltoolkit.codeplex.com/SourceControl/changeset/8aa8363b126bee402ef2f73e207ee3227abf4fad) commit for details. The fix will be available in the next release.