Sir,
 I need your help in finding the no of days from the selected value of two 
 AjaxCalenderExtender into a TextBox.
 See the screenshot below:-
   There are two AjaxCalenderExtender Controls, one in CheckInDate textbox and other in     CheckOutDate textBox.
  I want to display the value of CheckOutDate - CheckInDate  in Total days TextBox immeditely after I select  a CheckOutDate. How can it possible?