title: Validating fields after user clicks a form button in Service Now
body: <p>I am working on a change ticket form with two form buttons which are "Submit" and "Request Approval". Submit is a way of inserting the record in the table.However the ticket will only move forward when the user presses "Request Approval".</p>
  
  <p>I want to impose certain restrictions ONLY when a user clicks on "Request Approval" . By restrictions I meaning prompting the user to fill the Planned Start Date , End Date. However no such message should appear when a user clicks on Submit.</p>
  
  <p>One way of doing it is to put in a condition for visiblity through a UI action. But I want the button to visible at all times. Please help</p>