How I can do the control inthe left of the demos page.

[Sebastian]

I want to do something similar to the left control of screen of the demos page (the control say "All controls" and when is clicked look a green box with all the controls and theirs demos). Sorry for my bad english I speak spanish.
http://demos.telerik.com/aspnet-ajax/

[Venelin]

Hello Sebastian,

You can easily achieve the desired functionality by using the jQuery .animate() method. Please also refer to these demos:

http://www.w3schools.com/jquery/tryit.asp?filename=tryjquery_animation1_toggle
http://www.w3schools.com/jquery/tryit.asp?filename=tryjquery_animation1
http://demos.telerik.com/aspnet-ajax/imagegallery/ (see the gray button at the top right side of the page)

I hope this helps. If you however encounter any difficulties please don't hesitate to write us.

Regards,
Venelin
Telerik