I have a jquery datepicker that works 100% in my dev environment.
When I deploy site onto IIS, the datepicker does show up when the control gets the focus, but clicking on a date does not update the textbox.
Is this a specific permission that needs to be set on IIS?
The problem was not with IIS but with Internet Explorer.
Scripting has not be enabled for the 'Internet Zone'.
See this site for howto.