One of the downsides with online HTML documentation such as that of ASP.NET AJAX is that the search facilities are either not as slick as searching .CHM or .HLP files or, as is the case for ASP.NET AJAX, they are non-existent. Of course, you can Google or Live it but then you have to filter out all of the noise. Colleague Pat Long took the obvious step and created a custom Google search solely for the ASP.NET AJAX documentation. You can get at it here:-

http://www.google.com/coop/cse?cx=012161591400813264642%3Ayziniunzfbo