If you are asking about TelerikUI for ASP.NET Ajax having such control, then the answer is almost -- we do have a toggle button, just not with that same styling.
If you just want to achieve the appearance with toggability, you can use the following snippet:
Note: this will not work in IE7 and the animations will not be available in browser which do not support them.
Regards,
Ivan Zhekov
Telerik
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