Js validation on meeting module create view in sugarcrm Mobile app

Question

Hi All, 
 
 I have one use case, as a sugarcrm user if I am creating meeting for converted lead then system should display error popup message "meeting cannot be created for converted prospect." on meeting create view in sugarcrm Mobile app. 
 
 Can anyone suggest how to add above js validation on meeting module create view in sugarcrm Mobile app 
 
 Please suggest asap. 
 
 Kindest Regards, 
 Shreya

shreya dalvi · Answer

You can edit a field's value but not its label directly in a before save hook. Labels are usually specified on the user interface layer and do not change at the database level. To modify how a field appears in the UI, you'll need to customize your application's view templates or UI confi g uration separately from the before save hook. 
 // Show the meeting sub-panel if the lead status is "Qualified." if (leadStatus === "Qualified") { // Code to display the meeting sub-panel showMeetingSubPanel(); } else { // Code to hide the meeting sub-panel hideMeetingSubPanel(); }