I have a fairly complex UI in my application and have decided to take the approach outlined in http://www.telerik.com/help/aspnet-ajax/ajxchangecursor.html
This approach works partially in that the hourglass does appear during the AJAX call; however when the mouse is moved around during the AJAX call, the specified cursor is overridden whenever the mouse is positioned over asp:CheckBox or telerik:RadTextBox controls.
as inspiration but the RadTextBox controls ignore the new styles.
Is there a better approach to have the updated cursor apply to the body and
all of it's child controls?