Decoding a Spinner

• Determine which of the spinner's buttons, if any, triggered the request.
• If a parameter named clientId.less or clientId.more exists, then one of the spinner's buttons was clicked
  • The spinner's value must be incremented or decremented.
• If no parameter named clientId.less or clientId.more exists, the request was initiated by the user clicking the Next button
  • But the value still needs to be updated.