A validation rule is one way to restrict input in a table field or a control (such as a text box) on a form.
So in the above html code you can see we have an Ajax Control Toolkit Tab Container control with two Tab Panels having id as “first Tab” and “second Tab”.
The first tab has a label control and the second tab has a dropdown control with a validation control attached to it and a Validator Callout Extender control attached to the validation control.
See Automatically Populating Tabs for more information. If true the field appears normally while the recipient is adding or modifying the information in the field, but the data is not visible (the characters are hidden by asterisks) to any other signer or the sender.
When an envelope is completed the information is available to the sender through the Form Data link in the Docu Sign Console.