Subform Client Script

Subform Client Script

Good day, 

I have a subform where users can subscribe to various magazines. I would like to prevent the user from selecting the same magazine twice when adding a new row. Is there a way to prevent the user from doing this? (Can it be done via a client script?)

I also have two date fields in the same subform, where the user can select a start date and end date for the subscriptions. How can I alert the user if the start date is after the end date? 

Lastly, I am unable to get the values in a subform when I am using a Client Script. Even though the trigger is set to "onChange" of  a subform field, it does not look like a change is registered...

Any help with subform validations and alerts would be greatly appreciated.
    Zoho Marketing Automation

              Zoho Pagesense Resources

                Zoho SalesIQ Resources



                      Zoho TeamInbox Resources

                        Zoho DataPrep Resources



                          Zoho CRM Plus Resources

                            Zoho Books Resources


                              Zoho Subscriptions Resources

                                Zoho Desk Resources

                                  Zoho Projects Resources


                                    Zoho Sprints Resources


                                      Qntrl Resources


                                        Zoho Creator Resources


                                          Zoho WorkDrive Resources




                                              Zoho Campaigns Resources

                                                Zoho CRM Resources

                                                        Design. Discuss. Deliver.

                                                        Create visually engaging stories with Zoho Show.

                                                        Get Started Now