Closed Issue: SliderExtender causing crash on postback or navigating away from the page [25222]

Hi all, this is my first post - I have searched all over for information on this but if I have missed a solution then apologies.

I have been designing rather a large asp application which uses an accordion and various other extenders. One of my accordion pages needs to use sliders to change colours in boxes above them. I have added one slider, in the same way I have used them previously, but it has caused an error when I close the page as follows:

Microsoft JScript runtime error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.

The line it stops on with the debugger is:

if ((typeof(element._events) !== 'object') || (element._events == null)) throw Error.invalidOperation(Sys.Res.eventHandlerInvalid);

Specifically, the highlighted section is:

throw Error.invalidOperation(Sys.Res.eventHandlerInvalid)

I am not manually adding any handlers and have not done so on any of the other extenders I have used. If I remove the SliderExtender (but leave all the related textboxes) the system performs as expected.

I have been stuck on this for a few days now and would really appreciate any help offerred. If more information is required please let me know and I'll provide it.

Regards,

Simon
Comments: Please upgrade to the latest version of AJAX Control Toolkit v15.1. If the problem remains, feel free to post a new issue.