The Ajax controls will add a bit of size to your projext but they are fast - if you can do what you need with javascript they you should take that path first - have a look a jquery its a fast and lightwheigh javascript framwork.

hope this helps answer you question.

liam

don't think twice use the extenders -  it wont  do your site any harm.

Hi,

The dll files can be at the two places so as to be called by the application. One is the bin folder of application, the other is GAC.

To register the assembly in GAC, you can check this article: http://www.eggheadcafe.com/PrintSearchContent.asp?LINKID=713