Yet another option, in addition to the previously suggested ones, is to use RadDock's Attributes
property to set new attribute, storing the additional data.
You can then access the value of the new attribute on the client-side, as shown in the example below:
radDock = $find(
// the RadDock control is referenced
key = radDock.get_element().getAttribute(
// the attribute value is accessed
I have logged the requested feature in the Public Issue Tracking System, you can check it by following this link: Public URL
. We will consider implementing it in a future release of the RadControls for ASP.NET AJAX if it gains enough interest.
the Telerik team