Consider the following scenario:• You use the Microsoft AJAX 1.0 Control toolkit for Microsoft ASP.NET or the AJAX 1.0 Extensions for ASP.NET to create a custom Web Part for a Microsoft Office SharePoint Server 2007 Web site or for a Microsoft Windows SharePoint Services 3.0 Web site.• The custom Web Part contains an UpdatePanel control that includes a _doPostBack() function, such as a LinkButton control.• You add the custom Web Part to a SharePoint Services 2007 Web site or to a Windows SharePoint Services 3.0 Web site. The URL of the   read more »