Ajax tool kid in sharepoint

http://weblogs.asp.net/jan/archive/2007/02/26/using-the-ajax-control-toolkit-in-sharepoint.aspx


Actually SharePoint doesn't differ from any other ASP.NET web site to use the Control Toolit, there are only three things that you need to do:

Make sure SharePoint has access to AjaxControlToolkit.dll
You can do this in two ways: either you deploy the assembly to the Global Assembly Cache (GAC) or you put in the \BIN folder of the SharePoint site's folder.
Add an assembly reference in the web.config (note: for the future versions of the Control Tookit, the version number can change!):
<assemblies>
    ...
    <add assembly="AjaxControlToolkit, Version=1.0.10201.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"/>
    ....
</assemblies>
Add the tagprefix for the Control Toolkit in the web.config:
<controls>
    ...
    <add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="ajaxToolkit"/>
    ....
</controls>