Here’s one which is WAY better. First of all it’s a generic version, second of all it also has an addition PredicateT version, and there’s even one returning IEnumerableT too 
http://ra-ajax.org/jquery-ish-selector-for-webcontrols.blog
Pretty cool, huuh…!
Thx, It helped me a lot
Jay
I am a bit of a rookie with ASP.Net Controls.
If I created a dynamicPanel (custom control) for AJAX updates and was trying to find it on a content panel (on a default page) tied to a
Master page. What would the root control be? (my panel is inherited from : Panel)
Thanks … .Tim
Nice post! My own FindControlRecursive helped me out many times. Especially, when I deal with MasterPages. For example, one of such usage is shown in my post here – http://dotnetfollower.com/wordpress/2010/12/sharepoint-add-onchange-attribute-to-dropdownchoicefield/.
Thank you!